100400983 has 4 divisors (see below), whose sum is σ = 100423960. Its totient is φ = 100378008.

The previous prime is 100400953. The next prime is 100400999. The reversal of 100400983 is 389004001.

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-100400983 is a prime.

It is a super-3 number, since 3×100400983³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100400953) 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, 2685 + ... + 14422.

It is an arithmetic number, because the mean of its divisors is an integer number (25105990).

Almost surely, 2^100400983 is an apocalyptic number.

100400983 is a deficient number, since it is larger than the sum of its proper divisors (22977).

100400983 is an equidigital number, since it uses as much as digits as its factorization.

100400983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22976.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 100400983 is about 10020.0290917741. The cubic root of 100400983 is about 464.7784553767.

Adding to 100400983 its reverse (389004001), we get a palindrome (489404984).

The spelling of 100400983 in words is "one hundred million, four hundred thousand, nine hundred eighty-three".