151591489 has 4 divisors (see below), whose sum is σ = 173247424. Its totient is φ = 129935556.

The previous prime is 151591487. The next prime is 151591493. The reversal of 151591489 is 984195151.

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, and also an emirpimes, since its reverse is a distinct semiprime: 984195151 = 23801 ⋅41351.

It is a cyclic number.

It is not a de Polignac number, because 151591489 - 2¹ = 151591487 is a prime.

It is not an unprimeable number, because it can be changed into a prime (151591483) 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, 10827957 + ... + 10827970.

It is an arithmetic number, because the mean of its divisors is an integer number (43311856).

Almost surely, 2^151591489 is an apocalyptic number.

It is an amenable number.

151591489 is a deficient number, since it is larger than the sum of its proper divisors (21655935).

151591489 is an equidigital number, since it uses as much as digits as its factorization.

151591489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21655934.

The product of its digits is 64800, while the sum is 43.

The square root of 151591489 is about 12312.2495507523. The cubic root of 151591489 is about 533.2017992903.

The spelling of 151591489 in words is "one hundred fifty-one million, five hundred ninety-one thousand, four hundred eighty-nine".