2100990497 has 4 divisors (see below), whose sum is σ = 2168764416. Its totient is φ = 2033216580.

The previous prime is 2100990467. The next prime is 2100990517. The reversal of 2100990497 is 7940990012.

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 not a de Polignac number, because 2100990497 - 2⁶ = 2100990433 is a prime.

It is a super-2 number, since 2×2100990497² = 8828322136968614018, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2100990467) 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, 33886913 + ... + 33886974.

It is an arithmetic number, because the mean of its divisors is an integer number (542191104).

Almost surely, 2^2100990497 is an apocalyptic number.

It is an amenable number.

2100990497 is a deficient number, since it is larger than the sum of its proper divisors (67773919).

2100990497 is an equidigital number, since it uses as much as digits as its factorization.

2100990497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67773918.

The product of its (nonzero) digits is 40824, while the sum is 41.

The square root of 2100990497 is about 45836.5628837940. The cubic root of 2100990497 is about 1280.7804682338.

The spelling of 2100990497 in words is "two billion, one hundred million, nine hundred ninety thousand, four hundred ninety-seven".