77512801 has 2 divisors, whose sum is σ = 77512802. Its totient is φ = 77512800.

The previous prime is 77512781. The next prime is 77512807. The reversal of 77512801 is 10821577.

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., 70543201 + 6969600 = 8399^2 + 2640^2 .

It is a cyclic number.

It is not a de Polignac number, because 77512801 - 2¹¹ = 77510753 is a prime.

It is not a weakly prime, because it can be changed into another prime (77512807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38756400 + 38756401.

It is an arithmetic number, because the mean of its divisors is an integer number (38756401).

Almost surely, 2^77512801 is an apocalyptic number.

It is an amenable number.

77512801 is a deficient number, since it is larger than the sum of its proper divisors (1).

77512801 is an equidigital number, since it uses as much as digits as its factorization.

77512801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3920, while the sum is 31.

The square root of 77512801 is about 8804.1354487536. The cubic root of 77512801 is about 426.3744219298.

The spelling of 77512801 in words is "seventy-seven million, five hundred twelve thousand, eight hundred one".