77812153 has 4 divisors (see below), whose sum is σ = 77846400. Its totient is φ = 77777908.

The previous prime is 77812129. The next prime is 77812159. The reversal of 77812153 is 35121877.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77812153 is a prime.

It is a deceptive number, since it divides R_77812152.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77812159) 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, 13453 + ... + 18346.

It is an arithmetic number, because the mean of its divisors is an integer number (19461600).

It is a Poulet number, since it divides 2^77812152-1.

Almost surely, 2^77812153 is an apocalyptic number.

It is an amenable number.

77812153 is a deficient number, since it is larger than the sum of its proper divisors (34247).

77812153 is a wasteful number, since it uses less digits than its factorization.

77812153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34246.

The product of its digits is 11760, while the sum is 34.

The square root of 77812153 is about 8821.1197135058. The cubic root of 77812153 is about 426.9225983908.

The spelling of 77812153 in words is "seventy-seven million, eight hundred twelve thousand, one hundred fifty-three".