76021997 has 2 divisors, whose sum is σ = 76021998. Its totient is φ = 76021996.

The previous prime is 76021987. The next prime is 76022003. The reversal of 76021997 is 79912067.

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., 53421481 + 22600516 = 7309^2 + 4754^2 .

It is a cyclic number.

It is not a de Polignac number, because 76021997 - 2²⁴ = 59244781 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (76021987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38010998 + 38010999.

It is an arithmetic number, because the mean of its divisors is an integer number (38010999).

Almost surely, 2^76021997 is an apocalyptic number.

It is an amenable number.

76021997 is a deficient number, since it is larger than the sum of its proper divisors (1).

76021997 is an equidigital number, since it uses as much as digits as its factorization.

76021997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 47628, while the sum is 41.

The square root of 76021997 is about 8719.0594102804. The cubic root of 76021997 is about 423.6232208919.

The spelling of 76021997 in words is "seventy-six million, twenty-one thousand, nine hundred ninety-seven".