77212901 has 4 divisors (see below), whose sum is σ = 77397600. Its totient is φ = 77028204.

The previous prime is 77212859. The next prime is 77212913. The reversal of 77212901 is 10921277.

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 not a de Polignac number, because 77212901 - 2²⁶ = 10104037 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 (77212921) 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, 91721 + ... + 92558.

It is an arithmetic number, because the mean of its divisors is an integer number (19349400).

Almost surely, 2^77212901 is an apocalyptic number.

It is an amenable number.

77212901 is a deficient number, since it is larger than the sum of its proper divisors (184699).

77212901 is a wasteful number, since it uses less digits than its factorization.

77212901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184698.

The product of its (nonzero) digits is 1764, while the sum is 29.

The square root of 77212901 is about 8787.0871738022. The cubic root of 77212901 is about 425.8238248939.

The spelling of 77212901 in words is "seventy-seven million, two hundred twelve thousand, nine hundred one".