99131402 has 4 divisors (see below), whose sum is σ = 148697106. Its totient is φ = 49565700.

The previous prime is 99131401. The next prime is 99131411. The reversal of 99131402 is 20413199.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 71893441 + 27237961 = 8479^2 + 5219^2 .

It is not an unprimeable number, because it can be changed into a prime (99131401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24782849 + ... + 24782852.

Almost surely, 2^99131402 is an apocalyptic number.

99131402 is a deficient number, since it is larger than the sum of its proper divisors (49565704).

99131402 is a wasteful number, since it uses less digits than its factorization.

99131402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49565703.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 99131402 is about 9956.4753803743. The cubic root of 99131402 is about 462.8110818779.

The spelling of 99131402 in words is "ninety-nine million, one hundred thirty-one thousand, four hundred two".