32431997 has 4 divisors (see below), whose sum is σ = 34926780. Its totient is φ = 29937216.

The previous prime is 32431979. The next prime is 32431999. The reversal of 32431997 is 79913423.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1585081 + 30846916 = 1259^2 + 5554^2 .

It is a cyclic number.

It is not a de Polignac number, because 32431997 - 2⁸ = 32431741 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 32431997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32431999) 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, 1247372 + ... + 1247397.

It is an arithmetic number, because the mean of its divisors is an integer number (8731695).

Almost surely, 2^32431997 is an apocalyptic number.

It is an amenable number.

32431997 is a deficient number, since it is larger than the sum of its proper divisors (2494783).

32431997 is a wasteful number, since it uses less digits than its factorization.

32431997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2494782.

The product of its digits is 40824, while the sum is 38.

The square root of 32431997 is about 5694.9097446755. The cubic root of 32431997 is about 318.9024803208.

The spelling of 32431997 in words is "thirty-two million, four hundred thirty-one thousand, nine hundred ninety-seven".