1920864299 has 4 divisors (see below), whose sum is σ = 2021962440. Its totient is φ = 1819766160.

The previous prime is 1920864229. The next prime is 1920864307. The reversal of 1920864299 is 9924680291.

It is a happy number.

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-1920864299 is a prime.

It is a super-2 number, since 2×1920864299² = 7379439310345522802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1920864229) 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, 50549042 + ... + 50549079.

It is an arithmetic number, because the mean of its divisors is an integer number (505490610).

Almost surely, 2^1920864299 is an apocalyptic number.

1920864299 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1920864299 is a deficient number, since it is larger than the sum of its proper divisors (101098141).

1920864299 is a wasteful number, since it uses less digits than its factorization.

1920864299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101098140.

The product of its (nonzero) digits is 559872, while the sum is 50.

The square root of 1920864299 is about 43827.6659086472. The cubic root of 1920864299 is about 1243.0794728727.

The spelling of 1920864299 in words is "one billion, nine hundred twenty million, eight hundred sixty-four thousand, two hundred ninety-nine".