1851942793 has 2 divisors, whose sum is σ = 1851942794. Its totient is φ = 1851942792.

The previous prime is 1851942769. The next prime is 1851942797. The reversal of 1851942793 is 3972491581.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 966463744 + 885479049 = 31088^2 + 29757^2 .

It is a cyclic number.

It is not a de Polignac number, because 1851942793 - 2⁵ = 1851942761 is a prime.

It is not a weakly prime, because it can be changed into another prime (1851942797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 925971396 + 925971397.

It is an arithmetic number, because the mean of its divisors is an integer number (925971397).

Almost surely, 2^1851942793 is an apocalyptic number.

It is an amenable number.

1851942793 is a deficient number, since it is larger than the sum of its proper divisors (1).

1851942793 is an equidigital number, since it uses as much as digits as its factorization.

1851942793 is an evil number, because the sum of its binary digits is even.

The product of its digits is 544320, while the sum is 49.

The square root of 1851942793 is about 43034.2049188782. The cubic root of 1851942793 is about 1228.0306010210.

The spelling of 1851942793 in words is "one billion, eight hundred fifty-one million, nine hundred forty-two thousand, seven hundred ninety-three".