89969551 has 4 divisors (see below), whose sum is σ = 102822352. Its totient is φ = 77116752.

The previous prime is 89969549. The next prime is 89969587. The reversal of 89969551 is 15596998.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15596998 = 2 ⋅7798499.

It is a cyclic number.

It is not a de Polignac number, because 89969551 - 2¹ = 89969549 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 (89969521) 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, 6426390 + ... + 6426403.

It is an arithmetic number, because the mean of its divisors is an integer number (25705588).

Almost surely, 2^89969551 is an apocalyptic number.

89969551 is a deficient number, since it is larger than the sum of its proper divisors (12852801).

89969551 is a wasteful number, since it uses less digits than its factorization.

89969551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12852800.

The product of its digits is 874800, while the sum is 52.

The square root of 89969551 is about 9485.2280415391. The cubic root of 89969551 is about 448.0899303281.

The spelling of 89969551 in words is "eighty-nine million, nine hundred sixty-nine thousand, five hundred fifty-one".