89551391 has 4 divisors (see below), whose sum is σ = 92639400. Its totient is φ = 86463384.

The previous prime is 89551369. The next prime is 89551417. The reversal of 89551391 is 19315598.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19315598 = 2 ⋅9657799.

It is not a de Polignac number, because 89551391 - 2¹⁸ = 89289247 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 (89551361) 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, 1543961 + ... + 1544018.

It is an arithmetic number, because the mean of its divisors is an integer number (23159850).

Almost surely, 2^89551391 is an apocalyptic number.

89551391 is a deficient number, since it is larger than the sum of its proper divisors (3088009).

89551391 is a wasteful number, since it uses less digits than its factorization.

89551391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3088008.

The product of its digits is 48600, while the sum is 41.

The square root of 89551391 is about 9463.1596731747. The cubic root of 89551391 is about 447.3946420299.

The spelling of 89551391 in words is "eighty-nine million, five hundred fifty-one thousand, three hundred ninety-one".