89129421 has 6 divisors (see below), whose sum is σ = 128742510. Its totient is φ = 59419608.

The previous prime is 89129377. The next prime is 89129483. The reversal of 89129421 is 12492198.

It can be written as a sum of positive squares in only one way, i.e., 88566921 + 562500 = 9411^2 + 750^2 .

It is not a de Polignac number, because 89129421 - 2¹¹ = 89127373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89129321) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4951626 + ... + 4951643.

It is an arithmetic number, because the mean of its divisors is an integer number (21457085).

Almost surely, 2^89129421 is an apocalyptic number.

It is an amenable number.

89129421 is a deficient number, since it is larger than the sum of its proper divisors (39613089).

89129421 is a wasteful number, since it uses less digits than its factorization.

89129421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9903275 (or 9903272 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 89129421 is about 9440.8379395052. The cubic root of 89129421 is about 446.6908211363.

The spelling of 89129421 in words is "eighty-nine million, one hundred twenty-nine thousand, four hundred twenty-one".