32399997 has 16 divisors (see below), whose sum is σ = 51970560. Its totient is φ = 17539632.

The previous prime is 32399987. The next prime is 32400007. The reversal of 32399997 is 79999323.

It is an interprime number because it is at equal distance from previous prime (32399987) and next prime (32400007).

It is not a de Polignac number, because 32399997 - 2⁴ = 32399981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32399987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40203 + ... + 41000.

It is an arithmetic number, because the mean of its divisors is an integer number (3248160).

Almost surely, 2^32399997 is an apocalyptic number.

It is an amenable number.

32399997 is a deficient number, since it is larger than the sum of its proper divisors (19570563).

32399997 is a wasteful number, since it uses less digits than its factorization.

32399997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81232.

The product of its digits is 826686, while the sum is 51.

The square root of 32399997 is about 5692.0995247799. The cubic root of 32399997 is about 318.7975609154.

The spelling of 32399997 in words is "thirty-two million, three hundred ninety-nine thousand, nine hundred ninety-seven".