155852989 has 8 divisors (see below), whose sum is σ = 162299520. Its totient is φ = 149478000.

The previous prime is 155852971. The next prime is 155853007. The reversal of 155852989 is 989258551.

It is an interprime number because it is at equal distance from previous prime (155852971) and next prime (155853007).

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

It is a cyclic number.

It is not a de Polignac number, because 155852989 - 2⁷ = 155852861 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 (155852909) 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, 13417 + ... + 22174.

It is an arithmetic number, because the mean of its divisors is an integer number (20287440).

Almost surely, 2^155852989 is an apocalyptic number.

It is an amenable number.

155852989 is a deficient number, since it is larger than the sum of its proper divisors (6446531).

155852989 is a wasteful number, since it uses less digits than its factorization.

155852989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35771.

The product of its digits is 1296000, while the sum is 52.

The square root of 155852989 is about 12484.1094596291. The cubic root of 155852989 is about 538.1521073206.

The spelling of 155852989 in words is "one hundred fifty-five million, eight hundred fifty-two thousand, nine hundred eighty-nine".