1898149137 has 8 divisors (see below), whose sum is σ = 2531932704. Its totient is φ = 1264899168.

The previous prime is 1898149133. The next prime is 1898149157. The reversal of 1898149137 is 7319418981.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1898149137 - 2² = 1898149133 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1898149137.

It is not an unprimeable number, because it can be changed into a prime (1898149133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125023 + ... + 139380.

It is an arithmetic number, because the mean of its divisors is an integer number (316491588).

Almost surely, 2^1898149137 is an apocalyptic number.

It is an amenable number.

1898149137 is a deficient number, since it is larger than the sum of its proper divisors (633783567).

1898149137 is a wasteful number, since it uses less digits than its factorization.

1898149137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266799.

The product of its digits is 435456, while the sum is 51.

The square root of 1898149137 is about 43567.7534077671. The cubic root of 1898149137 is about 1238.1600219167.

The spelling of 1898149137 in words is "one billion, eight hundred ninety-eight million, one hundred forty-nine thousand, one hundred thirty-seven".