77490319 has 2 divisors, whose sum is σ = 77490320. Its totient is φ = 77490318.

The previous prime is 77490317. The next prime is 77490461. The reversal of 77490319 is 91309477.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 77490319 - 2¹ = 77490317 is a prime.

It is a super-2 number, since 2×77490319² = 12009499077443522, which contains 22 as substring.

Together with 77490317, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77490317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38745159 + 38745160.

It is an arithmetic number, because the mean of its divisors is an integer number (38745160).

Almost surely, 2^77490319 is an apocalyptic number.

77490319 is a deficient number, since it is larger than the sum of its proper divisors (1).

77490319 is an equidigital number, since it uses as much as digits as its factorization.

77490319 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47628, while the sum is 40.

The square root of 77490319 is about 8802.8585698056. The cubic root of 77490319 is about 426.3331957214. Note that the first 3 decimals are identical.

The spelling of 77490319 in words is "seventy-seven million, four hundred ninety thousand, three hundred nineteen".