39420997 has 8 divisors (see below), whose sum is σ = 49148352. Its totient is φ = 30717600.

The previous prime is 39420961. The next prime is 39421001. The reversal of 39420997 is 79902493.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 39420997 - 2²³ = 31032389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39420907) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 255904 + ... + 256057.

It is an arithmetic number, because the mean of its divisors is an integer number (6143544).

Almost surely, 2^39420997 is an apocalyptic number.

It is an amenable number.

39420997 is a deficient number, since it is larger than the sum of its proper divisors (9727355).

39420997 is a wasteful number, since it uses less digits than its factorization.

39420997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511979.

The product of its (nonzero) digits is 122472, while the sum is 43.

The square root of 39420997 is about 6278.6142579394. The cubic root of 39420997 is about 340.3370274005.

The spelling of 39420997 in words is "thirty-nine million, four hundred twenty thousand, nine hundred ninety-seven".