77243243 has 24 divisors (see below), whose sum is σ = 98169600. Its totient is φ = 59043600.

The previous prime is 77243237. The next prime is 77243249. The reversal of 77243243 is 34234277.

It is an interprime number because it is at equal distance from previous prime (77243237) and next prime (77243249).

It is not a de Polignac number, because 77243243 - 2¹⁰ = 77242219 is a prime.

It is a Duffinian number.

Its product of digits (28224) is a multiple of the sum of its prime divisors (288).

It is not an unprimeable number, because it can be changed into a prime (77243249) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 388058 + ... + 388256.

It is an arithmetic number, because the mean of its divisors is an integer number (4090400).

Almost surely, 2^77243243 is an apocalyptic number.

77243243 is a deficient number, since it is larger than the sum of its proper divisors (20926357).

77243243 is a wasteful number, since it uses less digits than its factorization.

77243243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359 (or 288 counting only the distinct ones).

The product of its digits is 28224, while the sum is 32.

The square root of 77243243 is about 8788.8135149177. The cubic root of 77243243 is about 425.8795956018.

The spelling of 77243243 in words is "seventy-seven million, two hundred forty-three thousand, two hundred forty-three".