32121997 has 2 divisors, whose sum is σ = 32121998. Its totient is φ = 32121996.

The previous prime is 32121977. The next prime is 32122001. The reversal of 32121997 is 79912123.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32046921 + 75076 = 5661^2 + 274^2 .

It is an emirp because it is prime and its reverse (79912123) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 32121997 - 2¹⁵ = 32089229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (32121907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16060998 + 16060999.

It is an arithmetic number, because the mean of its divisors is an integer number (16060999).

Almost surely, 2^32121997 is an apocalyptic number.

It is an amenable number.

32121997 is a deficient number, since it is larger than the sum of its proper divisors (1).

32121997 is an equidigital number, since it uses as much as digits as its factorization.

32121997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6804, while the sum is 34.

The square root of 32121997 is about 5667.6271048826. The cubic root of 32121997 is about 317.8831532788.

The spelling of 32121997 in words is "thirty-two million, one hundred twenty-one thousand, nine hundred ninety-seven".