15434989 has 4 divisors (see below), whose sum is σ = 15967260. Its totient is φ = 14902720.

The previous prime is 15434987. The next prime is 15434999. The reversal of 15434989 is 98943451.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2832489 + 12602500 = 1683^2 + 3550^2 .

It is a cyclic number.

It is not a de Polignac number, because 15434989 - 2¹ = 15434987 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15434981) 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, 266092 + ... + 266149.

It is an arithmetic number, because the mean of its divisors is an integer number (3991815).

Almost surely, 2^15434989 is an apocalyptic number.

It is an amenable number.

15434989 is a deficient number, since it is larger than the sum of its proper divisors (532271).

15434989 is an equidigital number, since it uses as much as digits as its factorization.

15434989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532270.

The product of its digits is 155520, while the sum is 43.

The square root of 15434989 is about 3928.7388561726. The cubic root of 15434989 is about 248.9824721672.

The spelling of 15434989 in words is "fifteen million, four hundred thirty-four thousand, nine hundred eighty-nine".