89894921 has 2 divisors, whose sum is σ = 89894922. Its totient is φ = 89894920.

The previous prime is 89894911. The next prime is 89894927. The reversal of 89894921 is 12949898.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89510521 + 384400 = 9461^2 + 620^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89894921 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 89894921.

It is not a weakly prime, because it can be changed into another prime (89894927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44947460 + 44947461.

It is an arithmetic number, because the mean of its divisors is an integer number (44947461).

Almost surely, 2^89894921 is an apocalyptic number.

It is an amenable number.

89894921 is a deficient number, since it is larger than the sum of its proper divisors (1).

89894921 is an equidigital number, since it uses as much as digits as its factorization.

89894921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373248, while the sum is 50.

The square root of 89894921 is about 9481.2932134810. The cubic root of 89894921 is about 447.9659987615.

The spelling of 89894921 in words is "eighty-nine million, eight hundred ninety-four thousand, nine hundred twenty-one".