1315011398 has 4 divisors (see below), whose sum is σ = 1972517100. Its totient is φ = 657505698.

The previous prime is 1315011391. The next prime is 1315011419. The reversal of 1315011398 is 8931105131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8931105131 = 13 ⋅687008087.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1315011391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328752848 + ... + 328752851.

It is an arithmetic number, because the mean of its divisors is an integer number (493129275).

Almost surely, 2^1315011398 is an apocalyptic number.

1315011398 is a deficient number, since it is larger than the sum of its proper divisors (657505702).

1315011398 is an equidigital number, since it uses as much as digits as its factorization.

1315011398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657505701.

The product of its (nonzero) digits is 3240, while the sum is 32.

The square root of 1315011398 is about 36263.0858863390. The cubic root of 1315011398 is about 1095.5776711883.

The spelling of 1315011398 in words is "one billion, three hundred fifteen million, eleven thousand, three hundred ninety-eight".