99278313 has 8 divisors (see below), whose sum is σ = 133413888. Its totient is φ = 65664144.

The previous prime is 99278303. The next prime is 99278383. The reversal of 99278313 is 31387299.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 99278313 - 2¹³ = 99270121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (99278303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129906 + ... + 130667.

It is an arithmetic number, because the mean of its divisors is an integer number (16676736).

Almost surely, 2^99278313 is an apocalyptic number.

It is an amenable number.

99278313 is a deficient number, since it is larger than the sum of its proper divisors (34135575).

99278313 is a wasteful number, since it uses less digits than its factorization.

99278313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260703.

The product of its digits is 81648, while the sum is 42.

The square root of 99278313 is about 9963.8503099956. The cubic root of 99278313 is about 463.0395950010.

The spelling of 99278313 in words is "ninety-nine million, two hundred seventy-eight thousand, three hundred thirteen".