32131997 has 2 divisors, whose sum is σ = 32131998. Its totient is φ = 32131996.

The previous prime is 32131949. The next prime is 32132003. The reversal of 32131997 is 79913123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21724921 + 10407076 = 4661^2 + 3226^2 .

It is an emirp because it is prime and its reverse (79913123) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-32131997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (32134997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16065998 + 16065999.

It is an arithmetic number, because the mean of its divisors is an integer number (16065999).

Almost surely, 2^32131997 is an apocalyptic number.

It is an amenable number.

32131997 is a deficient number, since it is larger than the sum of its proper divisors (1).

32131997 is an equidigital number, since it uses as much as digits as its factorization.

32131997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10206, while the sum is 35.

The square root of 32131997 is about 5668.5092396502. The cubic root of 32131997 is about 317.9161369246.

The spelling of 32131997 in words is "thirty-two million, one hundred thirty-one thousand, nine hundred ninety-seven".