15874489 has 2 divisors, whose sum is σ = 15874490. Its totient is φ = 15874488.

The previous prime is 15874483. The next prime is 15874493. The reversal of 15874489 is 98447851.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8761600 + 7112889 = 2960^2 + 2667^2 .

It is an emirp because it is prime and its reverse (98447851) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15874489 - 2¹⁷ = 15743417 is a prime.

It is a super-2 number, since 2×15874489² = 503998802022242, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (15874483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7937244 + 7937245.

It is an arithmetic number, because the mean of its divisors is an integer number (7937245).

Almost surely, 2^15874489 is an apocalyptic number.

It is an amenable number.

15874489 is a deficient number, since it is larger than the sum of its proper divisors (1).

15874489 is an equidigital number, since it uses as much as digits as its factorization.

15874489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 322560, while the sum is 46.

The square root of 15874489 is about 3984.2802361280. The cubic root of 15874489 is about 251.3235880915.

It can be divided in two parts, 158 and 74489, that added together give a palindrome (74647).

The spelling of 15874489 in words is "fifteen million, eight hundred seventy-four thousand, four hundred eighty-nine".