77796331 has 4 divisors (see below), whose sum is σ = 79605592. Its totient is φ = 75987072.

The previous prime is 77796307. The next prime is 77796343. The reversal of 77796331 is 13369777.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13369777 = 1553 ⋅8609.

It is a cyclic number.

It is not a de Polignac number, because 77796331 - 2¹⁵ = 77763563 is a prime.

It is a super-2 number, since 2×77796331² = 12104538234123122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (43), and also a Moran number because the ratio is a prime number: 1809217 = 77796331 / (7 + 7 + 7 + 9 + 6 + 3 + 3 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77796371) 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, 904566 + ... + 904651.

It is an arithmetic number, because the mean of its divisors is an integer number (19901398).

Almost surely, 2^77796331 is an apocalyptic number.

77796331 is a deficient number, since it is larger than the sum of its proper divisors (1809261).

77796331 is a wasteful number, since it uses less digits than its factorization.

77796331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1809260.

The product of its digits is 166698, while the sum is 43.

The square root of 77796331 is about 8820.2228429899. Note that the first 3 decimals coincide. The cubic root of 77796331 is about 426.8936602067.

The spelling of 77796331 in words is "seventy-seven million, seven hundred ninety-six thousand, three hundred thirty-one".