1658898149 has 4 divisors (see below), whose sum is σ = 1659913164. Its totient is φ = 1657883136.

The previous prime is 1658898083. The next prime is 1658898179. The reversal of 1658898149 is 9418988561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9418988561 = 29 ⋅324792709.

It can be written as a sum of positive squares in 2 ways, for example, as 769785025 + 889113124 = 27745^2 + 29818^2 .

It is a cyclic number.

It is not a de Polignac number, because 1658898149 - 2²⁰ = 1657849573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1658898179) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 505052 + ... + 508325.

It is an arithmetic number, because the mean of its divisors is an integer number (414978291).

Almost surely, 2^1658898149 is an apocalyptic number.

It is an amenable number.

1658898149 is a deficient number, since it is larger than the sum of its proper divisors (1015015).

1658898149 is a wasteful number, since it uses less digits than its factorization.

1658898149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1015014.

The product of its digits is 4976640, while the sum is 59.

The square root of 1658898149 is about 40729.5733957526. The cubic root of 1658898149 is about 1183.7861127234.

The spelling of 1658898149 in words is "one billion, six hundred fifty-eight million, eight hundred ninety-eight thousand, one hundred forty-nine".