152989021 has 4 divisors (see below), whose sum is σ = 154392700. Its totient is φ = 151585344.

The previous prime is 152989013. The next prime is 152989027. The reversal of 152989021 is 120989251.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 87216921 + 65772100 = 9339^2 + 8110^2 .

It is a cyclic number.

It is not a de Polignac number, because 152989021 - 2³ = 152989013 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 (152989027) 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, 701676 + ... + 701893.

It is an arithmetic number, because the mean of its divisors is an integer number (38598175).

Almost surely, 2^152989021 is an apocalyptic number.

It is an amenable number.

152989021 is a deficient number, since it is larger than the sum of its proper divisors (1403679).

152989021 is a wasteful number, since it uses less digits than its factorization.

152989021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1403678.

The product of its (nonzero) digits is 12960, while the sum is 37.

The square root of 152989021 is about 12368.8730691199. The cubic root of 152989021 is about 534.8353305771.

The spelling of 152989021 in words is "one hundred fifty-two million, nine hundred eighty-nine thousand, twenty-one".