74845669 has 2 divisors, whose sum is σ = 74845670. Its totient is φ = 74845668.

The previous prime is 74845643. The next prime is 74845681. The reversal of 74845669 is 96654847.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72080100 + 2765569 = 8490^2 + 1663^2 .

It is a cyclic number.

It is not a de Polignac number, because 74845669 - 2¹⁹ = 74321381 is a prime.

It is a super-2 number, since 2×74845669² = 11203748336115122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74845609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37422834 + 37422835.

It is an arithmetic number, because the mean of its divisors is an integer number (37422835).

Almost surely, 2^74845669 is an apocalyptic number.

It is an amenable number.

74845669 is a deficient number, since it is larger than the sum of its proper divisors (1).

74845669 is an equidigital number, since it uses as much as digits as its factorization.

74845669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1451520, while the sum is 49.

The square root of 74845669 is about 8651.3391448954. The cubic root of 74845669 is about 421.4268722220.

The spelling of 74845669 in words is "seventy-four million, eight hundred forty-five thousand, six hundred sixty-nine".