74966809 has 2 divisors, whose sum is σ = 74966810. Its totient is φ = 74966808.

The previous prime is 74966807. The next prime is 74966831. The reversal of 74966809 is 90866947.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63043600 + 11923209 = 7940^2 + 3453^2 .

It is a cyclic number.

It is not a de Polignac number, because 74966809 - 2¹ = 74966807 is a prime.

Together with 74966807, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (74966807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37483404 + 37483405.

It is an arithmetic number, because the mean of its divisors is an integer number (37483405).

Almost surely, 2^74966809 is an apocalyptic number.

It is an amenable number.

74966809 is a deficient number, since it is larger than the sum of its proper divisors (1).

74966809 is an equidigital number, since it uses as much as digits as its factorization.

74966809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 653184, while the sum is 49.

The square root of 74966809 is about 8658.3375425078. The cubic root of 74966809 is about 421.6541137526.

The spelling of 74966809 in words is "seventy-four million, nine hundred sixty-six thousand, eight hundred nine".