1927252091 has 6 divisors (see below), whose sum is σ = 1964304300. Its totient is φ = 1890886088.

The previous prime is 1927252079. The next prime is 1927252111. The reversal of 1927252091 is 1902527291.

It is not a de Polignac number, because 1927252091 - 2¹⁸ = 1926989947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1927252031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 340241 + ... + 345858.

It is an arithmetic number, because the mean of its divisors is an integer number (327384050).

Almost surely, 2^1927252091 is an apocalyptic number.

1927252091 is a deficient number, since it is larger than the sum of its proper divisors (37052209).

1927252091 is an frugal number, since it uses more digits than its factorization.

1927252091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686205 (or 686152 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 38.

The square root of 1927252091 is about 43900.4793937378. The cubic root of 1927252091 is about 1244.4558927338.

The spelling of 1927252091 in words is "one billion, nine hundred twenty-seven million, two hundred fifty-two thousand, ninety-one".