39961129 has 4 divisors (see below), whose sum is σ = 43035076. Its totient is φ = 36887184.

The previous prime is 39961127. The next prime is 39961133. The reversal of 39961129 is 92116993.

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 3055504 + 36905625 = 1748^2 + 6075^2 .

It is a cyclic number.

It is not a de Polignac number, because 39961129 - 2¹ = 39961127 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 39961091 and 39961100.

It is not an unprimeable number, because it can be changed into a prime (39961121) 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, 1536954 + ... + 1536979.

It is an arithmetic number, because the mean of its divisors is an integer number (10758769).

Almost surely, 2^39961129 is an apocalyptic number.

It is an amenable number.

39961129 is a deficient number, since it is larger than the sum of its proper divisors (3073947).

39961129 is a wasteful number, since it uses less digits than its factorization.

39961129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3073946.

The product of its digits is 26244, while the sum is 40.

The square root of 39961129 is about 6321.4815510290. The cubic root of 39961129 is about 341.8843726396.

The spelling of 39961129 in words is "thirty-nine million, nine hundred sixty-one thousand, one hundred twenty-nine".