77347091 has 4 divisors (see below), whose sum is σ = 80710032. Its totient is φ = 73984152.

The previous prime is 77347063. The next prime is 77347097. The reversal of 77347091 is 19074377.

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

It is a cyclic number.

It is not a de Polignac number, because 77347091 - 2⁶ = 77347027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77347097) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1681436 + ... + 1681481.

It is an arithmetic number, because the mean of its divisors is an integer number (20177508).

Almost surely, 2^77347091 is an apocalyptic number.

77347091 is a deficient number, since it is larger than the sum of its proper divisors (3362941).

77347091 is a wasteful number, since it uses less digits than its factorization.

77347091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3362940.

The product of its (nonzero) digits is 37044, while the sum is 38.

The square root of 77347091 is about 8794.7194952426. The cubic root of 77347091 is about 426.0703649922.

The spelling of 77347091 in words is "seventy-seven million, three hundred forty-seven thousand, ninety-one".