153812989 has 4 divisors (see below), whose sum is σ = 167796000. Its totient is φ = 139829980.

The previous prime is 153812977. The next prime is 153813019. The reversal of 153812989 is 989218351.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 153812989 - 2²³ = 145424381 is a prime.

It is a super-2 number, since 2×153812989² = 47316871170228242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (153812089) 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, 6991489 + ... + 6991510.

It is an arithmetic number, because the mean of its divisors is an integer number (41949000).

Almost surely, 2^153812989 is an apocalyptic number.

It is an amenable number.

153812989 is a deficient number, since it is larger than the sum of its proper divisors (13983011).

153812989 is a wasteful number, since it uses less digits than its factorization.

153812989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13983010.

The product of its digits is 155520, while the sum is 46.

The square root of 153812989 is about 12402.1364691734. The cubic root of 153812989 is about 535.7937836799.

The spelling of 153812989 in words is "one hundred fifty-three million, eight hundred twelve thousand, nine hundred eighty-nine".