76774913 has 4 divisors (see below), whose sum is σ = 77479380. Its totient is φ = 76070448.

The previous prime is 76774891. The next prime is 76774939. The reversal of 76774913 is 31947767.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31947767 = 181 ⋅176507.

It can be written as a sum of positive squares in 2 ways, for example, as 21003889 + 55771024 = 4583^2 + 7468^2 .

It is a cyclic number.

It is not a de Polignac number, because 76774913 - 2⁶ = 76774849 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (76774013) 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, 352070 + ... + 352287.

It is an arithmetic number, because the mean of its divisors is an integer number (19369845).

Almost surely, 2^76774913 is an apocalyptic number.

It is an amenable number.

76774913 is a deficient number, since it is larger than the sum of its proper divisors (704467).

76774913 is a wasteful number, since it uses less digits than its factorization.

76774913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704466.

The product of its digits is 222264, while the sum is 44.

The square root of 76774913 is about 8762.1294786142. The cubic root of 76774913 is about 425.0171397932.

The spelling of 76774913 in words is "seventy-six million, seven hundred seventy-four thousand, nine hundred thirteen".