77140591 has 4 divisors (see below), whose sum is σ = 84153384. Its totient is φ = 70127800.

The previous prime is 77140579. The next prime is 77140603. The reversal of 77140591 is 19504177.

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

It is an interprime number because it is at equal distance from previous prime (77140579) and next prime (77140603).

It is a cyclic number.

It is not a de Polignac number, because 77140591 - 2⁷ = 77140463 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 (77140501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3506380 + ... + 3506401.

It is an arithmetic number, because the mean of its divisors is an integer number (21038346).

Almost surely, 2^77140591 is an apocalyptic number.

77140591 is a deficient number, since it is larger than the sum of its proper divisors (7012793).

77140591 is a wasteful number, since it uses less digits than its factorization.

77140591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7012792.

The product of its (nonzero) digits is 8820, while the sum is 34.

The square root of 77140591 is about 8782.9716497322. The cubic root of 77140591 is about 425.6908551551.

The spelling of 77140591 in words is "seventy-seven million, one hundred forty thousand, five hundred ninety-one".