77031243 has 14 divisors (see below), whose sum is σ = 115495124. Its totient is φ = 51353676.

The previous prime is 77031223. The next prime is 77031257. The reversal of 77031243 is 34213077.

It is not a de Polignac number, because 77031243 - 2⁶ = 77031179 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77031223) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 52105 + ... + 53562.

Almost surely, 2^77031243 is an apocalyptic number.

77031243 is a deficient number, since it is larger than the sum of its proper divisors (38463881).

77031243 is an equidigital number, since it uses as much as digits as its factorization.

77031243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105685 (or 105670 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 27.

The square root of 77031243 is about 8776.7444419899. The cubic root of 77031243 is about 425.4896188810.

The spelling of 77031243 in words is "seventy-seven million, thirty-one thousand, two hundred forty-three".