77013397 has 2 divisors, whose sum is σ = 77013398. Its totient is φ = 77013396.

The previous prime is 77013379. The next prime is 77013413. The reversal of 77013397 is 79331077.

Together with previous prime (77013379) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74805201 + 2208196 = 8649^2 + 1486^2 .

It is a cyclic number.

It is not a de Polignac number, because 77013397 - 2¹⁹ = 76489109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77013697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38506698 + 38506699.

It is an arithmetic number, because the mean of its divisors is an integer number (38506699).

Almost surely, 2^77013397 is an apocalyptic number.

It is an amenable number.

77013397 is a deficient number, since it is larger than the sum of its proper divisors (1).

77013397 is an equidigital number, since it uses as much as digits as its factorization.

77013397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27783, while the sum is 37.

The square root of 77013397 is about 8775.7277191125. The cubic root of 77013397 is about 425.4567583000.

The spelling of 77013397 in words is "seventy-seven million, thirteen thousand, three hundred ninety-seven".