15028991 has 2 divisors, whose sum is σ = 15028992. Its totient is φ = 15028990.

The previous prime is 15028967. The next prime is 15028999. The reversal of 15028991 is 19982051.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15028991 - 2⁶ = 15028927 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15028999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7514495 + 7514496.

It is an arithmetic number, because the mean of its divisors is an integer number (7514496).

Almost surely, 2^15028991 is an apocalyptic number.

15028991 is a deficient number, since it is larger than the sum of its proper divisors (1).

15028991 is an equidigital number, since it uses as much as digits as its factorization.

15028991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 35.

The square root of 15028991 is about 3876.7242615383. The cubic root of 15028991 is about 246.7799895252.

The spelling of 15028991 in words is "fifteen million, twenty-eight thousand, nine hundred ninety-one".