15489469 has 2 divisors, whose sum is σ = 15489470. Its totient is φ = 15489468.

The previous prime is 15489457. The next prime is 15489473. The reversal of 15489469 is 96498451.

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., 11142244 + 4347225 = 3338^2 + 2085^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15489469 is a prime.

It is a super-2 number, since 2×15489469² = 479847299803922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15489479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7744734 + 7744735.

It is an arithmetic number, because the mean of its divisors is an integer number (7744735).

Almost surely, 2^15489469 is an apocalyptic number.

It is an amenable number.

15489469 is a deficient number, since it is larger than the sum of its proper divisors (1).

15489469 is an equidigital number, since it uses as much as digits as its factorization.

15489469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 311040, while the sum is 46.

The square root of 15489469 is about 3935.6662714209. Note that the first 3 decimals coincide. The cubic root of 15489469 is about 249.2750679258.

The spelling of 15489469 in words is "fifteen million, four hundred eighty-nine thousand, four hundred sixty-nine".