77271893 has 4 divisors (see below), whose sum is σ = 77306208. Its totient is φ = 77237580.

The previous prime is 77271889. The next prime is 77271913. The reversal of 77271893 is 39817277.

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 77271893 - 2² = 77271889 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 (77271833) 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, 13523 + ... + 18368.

It is an arithmetic number, because the mean of its divisors is an integer number (19326552).

Almost surely, 2^77271893 is an apocalyptic number.

It is an amenable number.

77271893 is a deficient number, since it is larger than the sum of its proper divisors (34315).

77271893 is a wasteful number, since it uses less digits than its factorization.

77271893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34314.

The product of its digits is 148176, while the sum is 44.

The square root of 77271893 is about 8790.4432766499. The cubic root of 77271893 is about 425.9322428916.

The spelling of 77271893 in words is "seventy-seven million, two hundred seventy-one thousand, eight hundred ninety-three".