15920089 has 2 divisors, whose sum is σ = 15920090. Its totient is φ = 15920088.

The previous prime is 15920083. The next prime is 15920123. The reversal of 15920089 is 98002951.

It is an a-pointer prime, because the next prime (15920123) can be obtained adding 15920089 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11614464 + 4305625 = 3408^2 + 2075^2 .

It is a cyclic number.

It is not a de Polignac number, because 15920089 - 2⁷ = 15919961 is a prime.

It is not a weakly prime, because it can be changed into another prime (15920083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7960044 + 7960045.

It is an arithmetic number, because the mean of its divisors is an integer number (7960045).

Almost surely, 2^15920089 is an apocalyptic number.

It is an amenable number.

15920089 is a deficient number, since it is larger than the sum of its proper divisors (1).

15920089 is an equidigital number, since it uses as much as digits as its factorization.

15920089 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 34.

The square root of 15920089 is about 3989.9986215536. The cubic root of 15920089 is about 251.5640031725.

The spelling of 15920089 in words is "fifteen million, nine hundred twenty thousand, eighty-nine".