99278451 has 6 divisors (see below), whose sum is σ = 143402220. Its totient is φ = 66185628.

The previous prime is 99278447. The next prime is 99278471. The reversal of 99278451 is 15487299.

It is not a de Polignac number, because 99278451 - 2² = 99278447 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 99278397 and 99278406.

It is not an unprimeable number, because it can be changed into a prime (99278471) 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, 5515461 + ... + 5515478.

It is an arithmetic number, because the mean of its divisors is an integer number (23900370).

Almost surely, 2^99278451 is an apocalyptic number.

99278451 is a deficient number, since it is larger than the sum of its proper divisors (44123769).

99278451 is a wasteful number, since it uses less digits than its factorization.

99278451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11030945 (or 11030942 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 99278451 is about 9963.8572350270. The cubic root of 99278451 is about 463.0398095475.

The spelling of 99278451 in words is "ninety-nine million, two hundred seventy-eight thousand, four hundred fifty-one".