15372289 has 2 divisors, whose sum is σ = 15372290. Its totient is φ = 15372288.

The previous prime is 15372271. The next prime is 15372293. The reversal of 15372289 is 98227351.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12250000 + 3122289 = 3500^2 + 1767^2 .

It is a cyclic number.

It is not a de Polignac number, because 15372289 - 2¹¹ = 15370241 is a prime.

It is not a weakly prime, because it can be changed into another prime (15372209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7686144 + 7686145.

It is an arithmetic number, because the mean of its divisors is an integer number (7686145).

It is a Proth number, since it is equal to 3753 ⋅ 2¹² + 1 and 3753 < 2¹².

Almost surely, 2^15372289 is an apocalyptic number.

It is an amenable number.

15372289 is a deficient number, since it is larger than the sum of its proper divisors (1).

15372289 is an equidigital number, since it uses as much as digits as its factorization.

15372289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 37.

The square root of 15372289 is about 3920.7510760057. The cubic root of 15372289 is about 248.6448758259.

The spelling of 15372289 in words is "fifteen million, three hundred seventy-two thousand, two hundred eighty-nine".