39702961 has 4 divisors (see below), whose sum is σ = 40776052. Its totient is φ = 38629872.

The previous prime is 39702959. The next prime is 39702983. The reversal of 39702961 is 16920793.

39702961 = 4455² + 4456².

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19855936 + 19847025 = 4456^2 + 4455^2 .

It is a cyclic number.

It is not a de Polignac number, because 39702961 - 2¹ = 39702959 is a prime.

It is a super-2 number, since 2×39702961² = 3152650224335042, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 1073053 = 39702961 / (3 + 9 + 7 + 0 + 2 + 9 + 6 + 1).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 39702961.

It is not an unprimeable number, because it can be changed into a prime (39702911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 536490 + ... + 536563.

It is an arithmetic number, because the mean of its divisors is an integer number (10194013).

Almost surely, 2^39702961 is an apocalyptic number.

39702961 is the 4456-th centered square number.

It is an amenable number.

39702961 is a deficient number, since it is larger than the sum of its proper divisors (1073091).

39702961 is a wasteful number, since it uses less digits than its factorization.

39702961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1073090.

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 39702961 is about 6301.0285668294. The cubic root of 39702961 is about 341.1465359208.

The spelling of 39702961 in words is "thirty-nine million, seven hundred two thousand, nine hundred sixty-one".