77140747 has 12 divisors (see below), whose sum is σ = 82315296. Its totient is φ = 72275840.

The previous prime is 77140733. The next prime is 77140757. The reversal of 77140747 is 74704177.

It is not a de Polignac number, because 77140747 - 2⁷ = 77140619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77140757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 84222 + ... + 85132.

It is an arithmetic number, because the mean of its divisors is an integer number (6859608).

Almost surely, 2^77140747 is an apocalyptic number.

77140747 is a deficient number, since it is larger than the sum of its proper divisors (5174549).

77140747 is a wasteful number, since it uses less digits than its factorization.

77140747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1238 (or 1221 counting only the distinct ones).

The product of its (nonzero) digits is 38416, while the sum is 37.

The square root of 77140747 is about 8782.9805305488. The cubic root of 77140747 is about 425.6911421105.

The spelling of 77140747 in words is "seventy-seven million, one hundred forty thousand, seven hundred forty-seven".