39656901 has 4 divisors (see below), whose sum is σ = 52875872. Its totient is φ = 26437932.

The previous prime is 39656867. The next prime is 39656921. The reversal of 39656901 is 10965693.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10965693 = 3 ⋅3655231.

It is a de Polignac number, because none of the positive numbers 2^k-39656901 is a prime.

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 39656901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39656921) 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, 6609481 + ... + 6609486.

It is an arithmetic number, because the mean of its divisors is an integer number (13218968).

Almost surely, 2^39656901 is an apocalyptic number.

It is an amenable number.

39656901 is a deficient number, since it is larger than the sum of its proper divisors (13218971).

39656901 is a wasteful number, since it uses less digits than its factorization.

39656901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13218970.

The product of its (nonzero) digits is 43740, while the sum is 39.

The square root of 39656901 is about 6297.3725473407. The cubic root of 39656901 is about 341.0145618031.

The spelling of 39656901 in words is "thirty-nine million, six hundred fifty-six thousand, nine hundred one".