77540743 has 4 divisors (see below), whose sum is σ = 88618000. Its totient is φ = 66463488.

The previous prime is 77540737. The next prime is 77540753. The reversal of 77540743 is 34704577.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 77540743 - 2⁵ = 77540711 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 (77540753) 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, 5538618 + ... + 5538631.

It is an arithmetic number, because the mean of its divisors is an integer number (22154500).

Almost surely, 2^77540743 is an apocalyptic number.

77540743 is a deficient number, since it is larger than the sum of its proper divisors (11077257).

77540743 is a wasteful number, since it uses less digits than its factorization.

77540743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11077256.

The product of its (nonzero) digits is 82320, while the sum is 37.

The square root of 77540743 is about 8805.7221736778. The cubic root of 77540743 is about 426.4256492655.

The spelling of 77540743 in words is "seventy-seven million, five hundred forty thousand, seven hundred forty-three".