74209769 has 2 divisors, whose sum is σ = 74209770. Its totient is φ = 74209768.

The previous prime is 74209747. The next prime is 74209789. The reversal of 74209769 is 96790247.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72454144 + 1755625 = 8512^2 + 1325^2 .

It is a cyclic number.

It is not a de Polignac number, because 74209769 - 2¹⁶ = 74144233 is a prime.

It is a super-2 number, since 2×74209769² = 11014179630066722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (74209789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37104884 + 37104885.

It is an arithmetic number, because the mean of its divisors is an integer number (37104885).

Almost surely, 2^74209769 is an apocalyptic number.

It is an amenable number.

74209769 is a deficient number, since it is larger than the sum of its proper divisors (1).

74209769 is an equidigital number, since it uses as much as digits as its factorization.

74209769 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 190512, while the sum is 44.

The square root of 74209769 is about 8614.5092141108. The cubic root of 74209769 is about 420.2299742041.

The spelling of 74209769 in words is "seventy-four million, two hundred nine thousand, seven hundred sixty-nine".