2315987389 has 2 divisors, whose sum is σ = 2315987390. Its totient is φ = 2315987388.

The previous prime is 2315987371. The next prime is 2315987393. The reversal of 2315987389 is 9837895132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1221502500 + 1094484889 = 34950^2 + 33083^2 .

It is a cyclic number.

It is not a de Polignac number, because 2315987389 - 2¹¹ = 2315985341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2315985389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1157993694 + 1157993695.

It is an arithmetic number, because the mean of its divisors is an integer number (1157993695).

Almost surely, 2^2315987389 is an apocalyptic number.

It is an amenable number.

2315987389 is a deficient number, since it is larger than the sum of its proper divisors (1).

2315987389 is an equidigital number, since it uses as much as digits as its factorization.

2315987389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3265920, while the sum is 55.

The square root of 2315987389 is about 48124.7066380669. The cubic root of 2315987389 is about 1323.0575337288.

The spelling of 2315987389 in words is "two billion, three hundred fifteen million, nine hundred eighty-seven thousand, three hundred eighty-nine".