1861972795 has 4 divisors (see below), whose sum is σ = 2234367360. Its totient is φ = 1489578232.

The previous prime is 1861972769. The next prime is 1861972817. The reversal of 1861972795 is 5972791681.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5972791681 = 107 ⋅55820483.

It is a cyclic number.

It is not a de Polignac number, because 1861972795 - 2²¹ = 1859875643 is a prime.

It is a super-2 number, since 2×1861972795² = 6933885378640224050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 186197275 + ... + 186197284.

It is an arithmetic number, because the mean of its divisors is an integer number (558591840).

Almost surely, 2^1861972795 is an apocalyptic number.

1861972795 is a deficient number, since it is larger than the sum of its proper divisors (372394565).

1861972795 is an equidigital number, since it uses as much as digits as its factorization.

1861972795 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372394564.

The product of its digits is 1905120, while the sum is 55.

The square root of 1861972795 is about 43150.5827886484. The cubic root of 1861972795 is about 1230.2435887011.

The spelling of 1861972795 in words is "one billion, eight hundred sixty-one million, nine hundred seventy-two thousand, seven hundred ninety-five".