89742991 has 8 divisors (see below), whose sum is σ = 97385904. Its totient is φ = 82205760.

The previous prime is 89742971. The next prime is 89743001. The reversal of 89742991 is 19924798.

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

It is not a de Polignac number, because 89742991 - 2⁵ = 89742959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89742901) 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, 24646 + ... + 28051.

It is an arithmetic number, because the mean of its divisors is an integer number (12173238).

Almost surely, 2^89742991 is an apocalyptic number.

89742991 is a deficient number, since it is larger than the sum of its proper divisors (7642913).

89742991 is a wasteful number, since it uses less digits than its factorization.

89742991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52841.

The product of its digits is 326592, while the sum is 49.

The square root of 89742991 is about 9473.2777326541. The cubic root of 89742991 is about 447.7134896780.

The spelling of 89742991 in words is "eighty-nine million, seven hundred forty-two thousand, nine hundred ninety-one".