84099251 has 4 divisors (see below), whose sum is σ = 84249192. Its totient is φ = 83949312.

The previous prime is 84099229. The next prime is 84099259. The reversal of 84099251 is 15299048.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84099251 is a prime.

It is a super-2 number, since 2×84099251² = 14145368037522002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84099259) 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, 74126 + ... + 75251.

It is an arithmetic number, because the mean of its divisors is an integer number (21062298).

Almost surely, 2^84099251 is an apocalyptic number.

84099251 is a deficient number, since it is larger than the sum of its proper divisors (149941).

84099251 is a wasteful number, since it uses less digits than its factorization.

84099251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149940.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 84099251 is about 9170.5643773979. The cubic root of 84099251 is about 438.1243348498.

The spelling of 84099251 in words is "eighty-four million, ninety-nine thousand, two hundred fifty-one".