77697007 has 2 divisors, whose sum is σ = 77697008. Its totient is φ = 77697006.

The previous prime is 77696897. The next prime is 77697031. The reversal of 77697007 is 70079677.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77697007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77697107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38848503 + 38848504.

It is an arithmetic number, because the mean of its divisors is an integer number (38848504).

Almost surely, 2^77697007 is an apocalyptic number.

77697007 is a deficient number, since it is larger than the sum of its proper divisors (1).

77697007 is an equidigital number, since it uses as much as digits as its factorization.

77697007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129654, while the sum is 43.

The square root of 77697007 is about 8814.5905747233. The cubic root of 77697007 is about 426.7119085191.

The spelling of 77697007 in words is "seventy-seven million, six hundred ninety-seven thousand, seven".