39901697 has 4 divisors (see below), whose sum is σ = 43529136. Its totient is φ = 36274260.

The previous prime is 39901679. The next prime is 39901699. The reversal of 39901697 is 79610993.

It is a happy number.

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.

It is not a de Polignac number, because 39901697 - 2⁸ = 39901441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39901699) 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, 1813703 + ... + 1813724.

It is an arithmetic number, because the mean of its divisors is an integer number (10882284).

Almost surely, 2^39901697 is an apocalyptic number.

It is an amenable number.

39901697 is a deficient number, since it is larger than the sum of its proper divisors (3627439).

39901697 is a wasteful number, since it uses less digits than its factorization.

39901697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3627438.

The product of its (nonzero) digits is 91854, while the sum is 44.

The square root of 39901697 is about 6316.7790051576. The cubic root of 39901697 is about 341.7147999079.

The spelling of 39901697 in words is "thirty-nine million, nine hundred one thousand, six hundred ninety-seven".