77770231 has 8 divisors (see below), whose sum is σ = 96960384. Its totient is φ = 60600120.

The previous prime is 77770219. The next prime is 77770237. The reversal of 77770231 is 13207777.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 77770231 - 2¹⁵ = 77737463 is a prime.

It is a super-2 number, since 2×77770231² = 12096417659586722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77770237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 504925 + ... + 505078.

It is an arithmetic number, because the mean of its divisors is an integer number (12120048).

Almost surely, 2^77770231 is an apocalyptic number.

77770231 is a deficient number, since it is larger than the sum of its proper divisors (19190153).

77770231 is a wasteful number, since it uses less digits than its factorization.

77770231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1010021.

The product of its (nonzero) digits is 14406, while the sum is 34.

The square root of 77770231 is about 8818.7431644197. The cubic root of 77770231 is about 426.8459151497.

The spelling of 77770231 in words is "seventy-seven million, seven hundred seventy thousand, two hundred thirty-one".