77893919 has 2 divisors, whose sum is σ = 77893920. Its totient is φ = 77893918.

The previous prime is 77893897. The next prime is 77893931. The reversal of 77893919 is 91939877.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77893919 - 2²⁴ = 61116703 is a prime.

It is a super-2 number, since 2×77893919² = 12134925234357122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77896919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38946959 + 38946960.

It is an arithmetic number, because the mean of its divisors is an integer number (38946960).

Almost surely, 2^77893919 is an apocalyptic number.

77893919 is a deficient number, since it is larger than the sum of its proper divisors (1).

77893919 is an equidigital number, since it uses as much as digits as its factorization.

77893919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 857304, while the sum is 53.

The square root of 77893919 is about 8825.7531689936. The cubic root of 77893919 is about 427.0720846077.

The spelling of 77893919 in words is "seventy-seven million, eight hundred ninety-three thousand, nine hundred nineteen".