74198689 has 2 divisors, whose sum is σ = 74198690. Its totient is φ = 74198688.

The previous prime is 74198669. The next prime is 74198699. The reversal of 74198689 is 98689147.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62536464 + 11662225 = 7908^2 + 3415^2 .

It is a cyclic number.

It is not a de Polignac number, because 74198689 - 2²¹ = 72101537 is a prime.

It is not a weakly prime, because it can be changed into another prime (74198639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37099344 + 37099345.

It is an arithmetic number, because the mean of its divisors is an integer number (37099345).

Almost surely, 2^74198689 is an apocalyptic number.

It is an amenable number.

74198689 is a deficient number, since it is larger than the sum of its proper divisors (1).

74198689 is an equidigital number, since it uses as much as digits as its factorization.

74198689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 52.

The square root of 74198689 is about 8613.8660890450. The cubic root of 74198689 is about 420.2090588092.

The spelling of 74198689 in words is "seventy-four million, one hundred ninety-eight thousand, six hundred eighty-nine".