77530379 has 2 divisors, whose sum is σ = 77530380. Its totient is φ = 77530378.

The previous prime is 77530357. The next prime is 77530417. The reversal of 77530379 is 97303577.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 77530379 - 2²⁴ = 60753163 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (77530879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38765189 + 38765190.

It is an arithmetic number, because the mean of its divisors is an integer number (38765190).

Almost surely, 2^77530379 is an apocalyptic number.

77530379 is a deficient number, since it is larger than the sum of its proper divisors (1).

77530379 is an equidigital number, since it uses as much as digits as its factorization.

77530379 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 138915, while the sum is 41.

The square root of 77530379 is about 8805.1336730342. The cubic root of 77530379 is about 426.4066499103.

The spelling of 77530379 in words is "seventy-seven million, five hundred thirty thousand, three hundred seventy-nine".