1990022469 has 4 divisors (see below), whose sum is σ = 2653363296. Its totient is φ = 1326681644.

The previous prime is 1990022449. The next prime is 1990022473. The reversal of 1990022469 is 9642200991.

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 1990022469 - 2⁸ = 1990022213 is a prime.

It is a super-2 number, since 2×1990022469² = 7920378854249711922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1990022469.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1990022449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 331670409 + ... + 331670414.

It is an arithmetic number, because the mean of its divisors is an integer number (663340824).

Almost surely, 2^1990022469 is an apocalyptic number.

It is an amenable number.

1990022469 is a deficient number, since it is larger than the sum of its proper divisors (663340827).

1990022469 is an equidigital number, since it uses as much as digits as its factorization.

1990022469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663340826.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 1990022469 is about 44609.6678871296. The cubic root of 1990022469 is about 1257.8224059132.

The spelling of 1990022469 in words is "one billion, nine hundred ninety million, twenty-two thousand, four hundred sixty-nine".