89742129 has 8 divisors (see below), whose sum is σ = 122202240. Its totient is φ = 58555056.

The previous prime is 89742119. The next prime is 89742139. The reversal of 89742129 is 92124798.

It is an interprime number because it is at equal distance from previous prime (89742119) and next prime (89742139).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 89742129 - 2⁵ = 89742097 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (89742109) 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, 318094 + ... + 318375.

It is an arithmetic number, because the mean of its divisors is an integer number (15275280).

Almost surely, 2^89742129 is an apocalyptic number.

It is an amenable number.

89742129 is a deficient number, since it is larger than the sum of its proper divisors (32460111).

89742129 is a wasteful number, since it uses less digits than its factorization.

89742129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636519.

The product of its digits is 72576, while the sum is 42.

The square root of 89742129 is about 9473.2322361483. The cubic root of 89742129 is about 447.7120562132.

The spelling of 89742129 in words is "eighty-nine million, seven hundred forty-two thousand, one hundred twenty-nine".