39332470921 has 4 divisors (see below), whose sum is σ = 39334148100. Its totient is φ = 39330793744.

The previous prime is 39332470831. The next prime is 39332470939. The reversal of 39332470921 is 12907423393.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12907423393 = 389 ⋅33181037.

It can be written as a sum of positive squares in 2 ways, for example, as 17118058896 + 22214412025 = 130836^2 + 149045^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39332470921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39332470981) 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, 802906 + ... + 850483.

It is an arithmetic number, because the mean of its divisors is an integer number (9833537025).

Almost surely, 2^39332470921 is an apocalyptic number.

It is an amenable number.

39332470921 is a deficient number, since it is larger than the sum of its proper divisors (1677179).

39332470921 is a wasteful number, since it uses less digits than its factorization.

39332470921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1677178.

The product of its (nonzero) digits is 244944, while the sum is 43.

The spelling of 39332470921 in words is "thirty-nine billion, three hundred thirty-two million, four hundred seventy thousand, nine hundred twenty-one".