77494819 has 2 divisors, whose sum is σ = 77494820. Its totient is φ = 77494818.

The previous prime is 77494799. The next prime is 77494877. The reversal of 77494819 is 91849477.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 77494819 - 2¹⁷ = 77363747 is a prime.

It is a super-2 number, since 2×77494819² = 12010893943685522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (77494519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38747409 + 38747410.

It is an arithmetic number, because the mean of its divisors is an integer number (38747410).

Almost surely, 2^77494819 is an apocalyptic number.

77494819 is a deficient number, since it is larger than the sum of its proper divisors (1).

77494819 is an equidigital number, since it uses as much as digits as its factorization.

77494819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 508032, while the sum is 49.

The square root of 77494819 is about 8803.1141648851. The cubic root of 77494819 is about 426.3414482028.

The spelling of 77494819 in words is "seventy-seven million, four hundred ninety-four thousand, eight hundred nineteen".