915936389 has 2 divisors, whose sum is σ = 915936390. Its totient is φ = 915936388.

The previous prime is 915936347. The next prime is 915936391. The reversal of 915936389 is 983639519.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 503643364 + 412293025 = 22442^2 + 20305^2 .

It is a cyclic number.

It is not a de Polignac number, because 915936389 - 2¹⁶ = 915870853 is a prime.

Together with 915936391, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 915936389.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (915936589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 457968194 + 457968195.

It is an arithmetic number, because the mean of its divisors is an integer number (457968195).

Almost surely, 2^915936389 is an apocalyptic number.

It is an amenable number.

915936389 is a deficient number, since it is larger than the sum of its proper divisors (1).

915936389 is an equidigital number, since it uses as much as digits as its factorization.

915936389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1574640, while the sum is 53.

The square root of 915936389 is about 30264.4409992982. The cubic root of 915936389 is about 971.1547479864.

The spelling of 915936389 in words is "nine hundred fifteen million, nine hundred thirty-six thousand, three hundred eighty-nine".