15006989 has 4 divisors (see below), whose sum is σ = 15042240. Its totient is φ = 14971740.

The previous prime is 15006931. The next prime is 15006991. The reversal of 15006989 is 98960051.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15006989 is a prime.

It is a super-2 number, since 2×15006989² = 450419437692242, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15006389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16979 + ... + 17840.

It is an arithmetic number, because the mean of its divisors is an integer number (3760560).

Almost surely, 2^15006989 is an apocalyptic number.

It is an amenable number.

15006989 is a deficient number, since it is larger than the sum of its proper divisors (35251).

15006989 is an equidigital number, since it uses as much as digits as its factorization.

15006989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35250.

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 15006989 is about 3873.8855171520. The cubic root of 15006989 is about 246.6595044995.

The spelling of 15006989 in words is "fifteen million, six thousand, nine hundred eighty-nine".