77250913 has 2 divisors, whose sum is σ = 77250914. Its totient is φ = 77250912.

The previous prime is 77250889. The next prime is 77250923. The reversal of 77250913 is 31905277.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72726784 + 4524129 = 8528^2 + 2127^2 .

It is a cyclic number.

It is not a de Polignac number, because 77250913 - 2¹³ = 77242721 is a prime.

It is not a weakly prime, because it can be changed into another prime (77250923) 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, 38625456 + 38625457.

It is an arithmetic number, because the mean of its divisors is an integer number (38625457).

Almost surely, 2^77250913 is an apocalyptic number.

It is an amenable number.

77250913 is a deficient number, since it is larger than the sum of its proper divisors (1).

77250913 is an equidigital number, since it uses as much as digits as its factorization.

77250913 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13230, while the sum is 34.

The square root of 77250913 is about 8789.2498542253. The cubic root of 77250913 is about 425.8936912830.

The spelling of 77250913 in words is "seventy-seven million, two hundred fifty thousand, nine hundred thirteen".