1154140198 has 4 divisors (see below), whose sum is σ = 1731210300. Its totient is φ = 577070098.

The previous prime is 1154140177. The next prime is 1154140307. The reversal of 1154140198 is 8910414511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8910414511 = 58913 ⋅151247.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 288535048 + ... + 288535051.

It is an arithmetic number, because the mean of its divisors is an integer number (432802575).

Almost surely, 2^1154140198 is an apocalyptic number.

1154140198 is a deficient number, since it is larger than the sum of its proper divisors (577070102).

1154140198 is an equidigital number, since it uses as much as digits as its factorization.

1154140198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577070101.

The product of its (nonzero) digits is 5760, while the sum is 34.

The square root of 1154140198 is about 33972.6389613760. The cubic root of 1154140198 is about 1048.9453349570.

The spelling of 1154140198 in words is "one billion, one hundred fifty-four million, one hundred forty thousand, one hundred ninety-eight".