39002921 has 4 divisors (see below), whose sum is σ = 40057092. Its totient is φ = 37948752.

The previous prime is 39002897. The next prime is 39002959. The reversal of 39002921 is 12920093.

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 28472896 + 10530025 = 5336^2 + 3245^2 .

It is a cyclic number.

It is not a de Polignac number, because 39002921 - 2⁶ = 39002857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39007921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 527030 + ... + 527103.

It is an arithmetic number, because the mean of its divisors is an integer number (10014273).

Almost surely, 2^39002921 is an apocalyptic number.

It is an amenable number.

39002921 is a deficient number, since it is larger than the sum of its proper divisors (1054171).

39002921 is a wasteful number, since it uses less digits than its factorization.

39002921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1054170.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 39002921 is about 6245.2318611882. The cubic root of 39002921 is about 339.1296105248.

The spelling of 39002921 in words is "thirty-nine million, two thousand, nine hundred twenty-one".