3122621987 has 2 divisors, whose sum is σ = 3122621988. Its totient is φ = 3122621986.

The previous prime is 3122621969. The next prime is 3122622001. The reversal of 3122621987 is 7891262213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3122621987 - 2⁸ = 3122621731 is a prime.

It is not a weakly prime, because it can be changed into another prime (3122621927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1561310993 + 1561310994.

It is an arithmetic number, because the mean of its divisors is an integer number (1561310994).

Almost surely, 2^3122621987 is an apocalyptic number.

3122621987 is a deficient number, since it is larger than the sum of its proper divisors (1).

3122621987 is an equidigital number, since it uses as much as digits as its factorization.

3122621987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 41.

The square root of 3122621987 is about 55880.4257947271. The cubic root of 3122621987 is about 1461.6379295496.

The spelling of 3122621987 in words is "three billion, one hundred twenty-two million, six hundred twenty-one thousand, nine hundred eighty-seven".