1315138658 has 4 divisors (see below), whose sum is σ = 1972707990. Its totient is φ = 657569328.

The previous prime is 1315138651. The next prime is 1315138681. The reversal of 1315138658 is 8568315131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8568315131 = 727 ⋅11785853.

It can be written as a sum of positive squares in only one way, i.e., 1247290489 + 67848169 = 35317^2 + 8237^2 .

It is not an unprimeable number, because it can be changed into a prime (1315138651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328784663 + ... + 328784666.

Almost surely, 2^1315138658 is an apocalyptic number.

1315138658 is a deficient number, since it is larger than the sum of its proper divisors (657569332).

1315138658 is an equidigital number, since it uses as much as digits as its factorization.

1315138658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657569331.

The product of its digits is 86400, while the sum is 41.

The square root of 1315138658 is about 36264.8405208130. The cubic root of 1315138658 is about 1095.6130114947.

The spelling of 1315138658 in words is "one billion, three hundred fifteen million, one hundred thirty-eight thousand, six hundred fifty-eight".