74856869 has 2 divisors, whose sum is σ = 74856870. Its totient is φ = 74856868.

The previous prime is 74856779. The next prime is 74856893. The reversal of 74856869 is 96865847.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70392100 + 4464769 = 8390^2 + 2113^2 .

It is a cyclic number.

It is not a de Polignac number, because 74856869 - 2¹⁶ = 74791333 is a prime.

It is a super-2 number, since 2×74856869² = 11207101672966322, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 74856869.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74858869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37428434 + 37428435.

It is an arithmetic number, because the mean of its divisors is an integer number (37428435).

Almost surely, 2^74856869 is an apocalyptic number.

It is an amenable number.

74856869 is a deficient number, since it is larger than the sum of its proper divisors (1).

74856869 is an equidigital number, since it uses as much as digits as its factorization.

74856869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2903040, while the sum is 53.

The square root of 74856869 is about 8651.9864193144. The cubic root of 74856869 is about 421.4478921225.

The spelling of 74856869 in words is "seventy-four million, eight hundred fifty-six thousand, eight hundred sixty-nine".