76513649 has 2 divisors, whose sum is σ = 76513650. Its totient is φ = 76513648.

The previous prime is 76513643. The next prime is 76513681. The reversal of 76513649 is 94631567.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74511424 + 2002225 = 8632^2 + 1415^2 .

It is a cyclic number.

It is not a de Polignac number, because 76513649 - 2¹² = 76509553 is a prime.

It is not a weakly prime, because it can be changed into another prime (76513643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38256824 + 38256825.

It is an arithmetic number, because the mean of its divisors is an integer number (38256825).

Almost surely, 2^76513649 is an apocalyptic number.

It is an amenable number.

76513649 is a deficient number, since it is larger than the sum of its proper divisors (1).

76513649 is an equidigital number, since it uses as much as digits as its factorization.

76513649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 41.

The square root of 76513649 is about 8747.2080688640. The cubic root of 76513649 is about 424.5344826764.

The spelling of 76513649 in words is "seventy-six million, five hundred thirteen thousand, six hundred forty-nine".