77376997 has 4 divisors (see below), whose sum is σ = 78174796. Its totient is φ = 76579200.

The previous prime is 77376989. The next prime is 77377021. The reversal of 77376997 is 79967377.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79967377 = 7 ⋅11423911.

It can be written as a sum of positive squares in 2 ways, for example, as 28740321 + 48636676 = 5361^2 + 6974^2 .

It is a cyclic number.

It is not a de Polignac number, because 77376997 - 2³ = 77376989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77376917) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 398754 + ... + 398947.

It is an arithmetic number, because the mean of its divisors is an integer number (19543699).

Almost surely, 2^77376997 is an apocalyptic number.

It is an amenable number.

77376997 is a deficient number, since it is larger than the sum of its proper divisors (797799).

77376997 is an equidigital number, since it uses as much as digits as its factorization.

77376997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797798.

The product of its digits is 3500658, while the sum is 55.

The square root of 77376997 is about 8796.4195557056. The cubic root of 77376997 is about 426.1252708212.

The spelling of 77376997 in words is "seventy-seven million, three hundred seventy-six thousand, nine hundred ninety-seven".