100399976 has 16 divisors (see below), whose sum is σ = 189292740. Its totient is φ = 49921920.

The previous prime is 100399973. The next prime is 100400017. The reversal of 100399976 is 679993001.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 89680900 + 10719076 = 9470^2 + 3274^2 .

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (100399973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33221 + ... + 36116.

Almost surely, 2^100399976 is an apocalyptic number.

It is an amenable number.

100399976 is a deficient number, since it is larger than the sum of its proper divisors (88892764).

100399976 is a wasteful number, since it uses less digits than its factorization.

100399976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69524 (or 69520 counting only the distinct ones).

The product of its (nonzero) digits is 91854, while the sum is 44.

The square root of 100399976 is about 10019.9788422930. The cubic root of 100399976 is about 464.7769014959.

The spelling of 100399976 in words is "one hundred million, three hundred ninety-nine thousand, nine hundred seventy-six".