76261621 has 2 divisors, whose sum is σ = 76261622. Its totient is φ = 76261620.

The previous prime is 76261613. The next prime is 76261637. The reversal of 76261621 is 12616267.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75082225 + 1179396 = 8665^2 + 1086^2 .

It is a cyclic number.

It is not a de Polignac number, because 76261621 - 2³ = 76261613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (76264621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38130810 + 38130811.

It is an arithmetic number, because the mean of its divisors is an integer number (38130811).

Almost surely, 2^76261621 is an apocalyptic number.

It is an amenable number.

76261621 is a deficient number, since it is larger than the sum of its proper divisors (1).

76261621 is an equidigital number, since it uses as much as digits as its factorization.

76261621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 31.

The square root of 76261621 is about 8732.7899894593. The cubic root of 76261621 is about 424.0678458092.

Adding to 76261621 its reverse (12616267), we get a palindrome (88877888).

The spelling of 76261621 in words is "seventy-six million, two hundred sixty-one thousand, six hundred twenty-one".