74777091 has 4 divisors (see below), whose sum is σ = 99702792. Its totient is φ = 49851392.

The previous prime is 74777069. The next prime is 74777119. The reversal of 74777091 is 19077747.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74777091 is a prime.

It is a super-2 number, since 2×74777091² = 11183226676844562, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (74777041) 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, 12462846 + ... + 12462851.

It is an arithmetic number, because the mean of its divisors is an integer number (24925698).

Almost surely, 2^74777091 is an apocalyptic number.

74777091 is a deficient number, since it is larger than the sum of its proper divisors (24925701).

74777091 is a wasteful number, since it uses less digits than its factorization.

74777091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24925700.

The product of its (nonzero) digits is 86436, while the sum is 42.

The square root of 74777091 is about 8647.3748039506. The cubic root of 74777091 is about 421.2981208694.

The spelling of 74777091 in words is "seventy-four million, seven hundred seventy-seven thousand, ninety-one".