1318153898 has 4 divisors (see below), whose sum is σ = 1977230850. Its totient is φ = 659076948.

The previous prime is 1318153867. The next prime is 1318153931. The reversal of 1318153898 is 8983518131.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1316456089 + 1697809 = 36283^2 + 1303^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 329538473 + ... + 329538476.

Almost surely, 2^1318153898 is an apocalyptic number.

1318153898 is a deficient number, since it is larger than the sum of its proper divisors (659076952).

1318153898 is an equidigital number, since it uses as much as digits as its factorization.

1318153898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 659076951.

The product of its digits is 207360, while the sum is 47.

The square root of 1318153898 is about 36306.3892173265. The cubic root of 1318153898 is about 1096.4496823854.

The spelling of 1318153898 in words is "one billion, three hundred eighteen million, one hundred fifty-three thousand, eight hundred ninety-eight".