1990772299 has 4 divisors (see below), whose sum is σ = 1992393360. Its totient is φ = 1989151240.

The previous prime is 1990772293. The next prime is 1990772321. The reversal of 1990772299 is 9922770991.

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

It is a cyclic number.

It is not a de Polignac number, because 1990772299 - 2¹⁷ = 1990641227 is a prime.

It is a super-3 number, since 3×1990772299³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1990772293) 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, 808687 + ... + 811144.

It is an arithmetic number, because the mean of its divisors is an integer number (498098340).

Almost surely, 2^1990772299 is an apocalyptic number.

1990772299 is a deficient number, since it is larger than the sum of its proper divisors (1621061).

1990772299 is a wasteful number, since it uses less digits than its factorization.

1990772299 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1621060.

The product of its (nonzero) digits is 1285956, while the sum is 55.

The square root of 1990772299 is about 44618.0714397205. The cubic root of 1990772299 is about 1257.9803663644.

The spelling of 1990772299 in words is "one billion, nine hundred ninety million, seven hundred seventy-two thousand, two hundred ninety-nine".