100202001989 has 4 divisors (see below), whose sum is σ = 100208231424. Its totient is φ = 100195772556.

The previous prime is 100202001979. The next prime is 100202002007. The reversal of 100202001989 is 989100202001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100202001989 is a prime.

It is a super-2 number, since 2×100202001989² (a number of 23 digits) contains 22 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 (100202001979) 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, 3090527 + ... + 3122780.

It is an arithmetic number, because the mean of its divisors is an integer number (25052057856).

Almost surely, 2^100202001989 is an apocalyptic number.

It is an amenable number.

100202001989 is a deficient number, since it is larger than the sum of its proper divisors (6229435).

100202001989 is an equidigital number, since it uses as much as digits as its factorization.

100202001989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6229434.

The product of its (nonzero) digits is 2592, while the sum is 32.

The spelling of 100202001989 in words is "one hundred billion, two hundred two million, one thousand, nine hundred eighty-nine".