89431387 has 8 divisors (see below), whose sum is σ = 90931680. Its totient is φ = 87937920.

The previous prime is 89431379. The next prime is 89431393. The reversal of 89431387 is 78313498.

It is a happy number.

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 89431387 - 2³ = 89431379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89431327) 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, 29289 + ... + 32197.

It is an arithmetic number, because the mean of its divisors is an integer number (11366460).

Almost surely, 2^89431387 is an apocalyptic number.

89431387 is a deficient number, since it is larger than the sum of its proper divisors (1500293).

89431387 is a wasteful number, since it uses less digits than its factorization.

89431387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3413.

The product of its digits is 145152, while the sum is 43.

The square root of 89431387 is about 9456.8169592099. The cubic root of 89431387 is about 447.1947078689.

The spelling of 89431387 in words is "eighty-nine million, four hundred thirty-one thousand, three hundred eighty-seven".