152777989 has 8 divisors (see below), whose sum is σ = 188034560. Its totient is φ = 120879216.

The previous prime is 152777981. The next prime is 152778001. The reversal of 152777989 is 989777251.

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 152777989 - 2³ = 152777981 is a prime.

It is a super-2 number, since 2×152777989² = 46682227845768242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (152777981) 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, 839349 + ... + 839530.

It is an arithmetic number, because the mean of its divisors is an integer number (23504320).

Almost surely, 2^152777989 is an apocalyptic number.

It is an amenable number.

152777989 is a deficient number, since it is larger than the sum of its proper divisors (35256571).

152777989 is a wasteful number, since it uses less digits than its factorization.

152777989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1678899.

The product of its digits is 2222640, while the sum is 55.

The square root of 152777989 is about 12360.3393561827. The cubic root of 152777989 is about 534.5893013637.

The spelling of 152777989 in words is "one hundred fifty-two million, seven hundred seventy-seven thousand, nine hundred eighty-nine".