1901797092 has 72 divisors (see below), whose sum is σ = 5274864504. Its totient is φ = 574119936.

The previous prime is 1901797081. The next prime is 1901797109. The reversal of 1901797092 is 2907971091.

It can be written as a sum of positive squares in 4 ways, for example, as 2232036 + 1899565056 = 1494^2 + 43584^2 .

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 13533 + ... + 63140.

It is an arithmetic number, because the mean of its divisors is an integer number (73262007).

Almost surely, 2^1901797092 is an apocalyptic number.

1901797092 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1901797092 is an abundant number, since it is smaller than the sum of its proper divisors (3373067412).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1901797092 is a wasteful number, since it uses less digits than its factorization.

1901797092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76749 (or 76744 counting only the distinct ones).

The product of its (nonzero) digits is 71442, while the sum is 45.

The square root of 1901797092 is about 43609.5986223217. The cubic root of 1901797092 is about 1238.9526996426.

The spelling of 1901797092 in words is "one billion, nine hundred one million, seven hundred ninety-seven thousand, ninety-two".