154527989 has 16 divisors (see below), whose sum is σ = 194987520. Its totient is φ = 118955760.

The previous prime is 154527983. The next prime is 154527991. The reversal of 154527989 is 989725451.

154527989 = 7176² + 7177² + 7178².

It is not a de Polignac number, because 154527989 - 2⁴ = 154527973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154527983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5699 + ... + 18480.

It is an arithmetic number, because the mean of its divisors is an integer number (12186720).

Almost surely, 2^154527989 is an apocalyptic number.

It is an amenable number.

154527989 is a deficient number, since it is larger than the sum of its proper divisors (40459531).

154527989 is a wasteful number, since it uses less digits than its factorization.

154527989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24280.

The product of its digits is 907200, while the sum is 50.

The square root of 154527989 is about 12430.9287263663. The cubic root of 154527989 is about 536.6227134165.

The spelling of 154527989 in words is "one hundred fifty-four million, five hundred twenty-seven thousand, nine hundred eighty-nine".