76970521 has 2 divisors, whose sum is σ = 76970522. Its totient is φ = 76970520.

The previous prime is 76970519. The next prime is 76970527. The reversal of 76970521 is 12507967.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69889600 + 7080921 = 8360^2 + 2661^2 .

It is a cyclic number.

It is not a de Polignac number, because 76970521 - 2¹ = 76970519 is a prime.

It is a super-2 number, since 2×76970521² = 11848922206022882, which contains 22 as substring.

Together with 76970519, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (76970527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38485260 + 38485261.

It is an arithmetic number, because the mean of its divisors is an integer number (38485261).

Almost surely, 2^76970521 is an apocalyptic number.

It is an amenable number.

76970521 is a deficient number, since it is larger than the sum of its proper divisors (1).

76970521 is an equidigital number, since it uses as much as digits as its factorization.

76970521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26460, while the sum is 37.

The square root of 76970521 is about 8773.2845046767. The cubic root of 76970521 is about 425.3777881856.

The spelling of 76970521 in words is "seventy-six million, nine hundred seventy thousand, five hundred twenty-one".