74135689 has 2 divisors, whose sum is σ = 74135690. Its totient is φ = 74135688.

The previous prime is 74135671. The next prime is 74135713. The reversal of 74135689 is 98653147.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74097664 + 38025 = 8608^2 + 195^2 .

It is an emirp because it is prime and its reverse (98653147) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74135689 - 2¹¹ = 74133641 is a prime.

It is a super-2 number, since 2×74135689² = 10992200767009442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (74135639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37067844 + 37067845.

It is an arithmetic number, because the mean of its divisors is an integer number (37067845).

Almost surely, 2^74135689 is an apocalyptic number.

It is an amenable number.

74135689 is a deficient number, since it is larger than the sum of its proper divisors (1).

74135689 is an equidigital number, since it uses as much as digits as its factorization.

74135689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 43.

The square root of 74135689 is about 8610.2084179188. The cubic root of 74135689 is about 420.0900959401.

The spelling of 74135689 in words is "seventy-four million, one hundred thirty-five thousand, six hundred eighty-nine".