89953981 has 4 divisors (see below), whose sum is σ = 96873532. Its totient is φ = 83034432.

The previous prime is 89953967. The next prime is 89954047. The reversal of 89953981 is 18935998.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18935998 = 2 ⋅9467999.

It can be written as a sum of positive squares in 2 ways, for example, as 30802500 + 59151481 = 5550^2 + 7691^2 .

It is not a de Polignac number, because 89953981 - 2¹³ = 89945789 is a prime.

It is a super-2 number, since 2×89953981² = 16183437395496722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89953181) 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, 3459756 + ... + 3459781.

It is an arithmetic number, because the mean of its divisors is an integer number (24218383).

Almost surely, 2^89953981 is an apocalyptic number.

It is an amenable number.

89953981 is a deficient number, since it is larger than the sum of its proper divisors (6919551).

89953981 is a wasteful number, since it uses less digits than its factorization.

89953981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6919550.

The product of its digits is 699840, while the sum is 52.

The square root of 89953981 is about 9484.4072561231. The cubic root of 89953981 is about 448.0640802391.

The spelling of 89953981 in words is "eighty-nine million, nine hundred fifty-three thousand, nine hundred eighty-one".