1940757787 has 2 divisors, whose sum is σ = 1940757788. Its totient is φ = 1940757786.

The previous prime is 1940757727. The next prime is 1940757799. The reversal of 1940757787 is 7877570491.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1940757787 is a prime.

It is a super-2 number, since 2×1940757787² = 7533081575602274738, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1940757727) 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 as a sum of consecutive naturals, namely, 970378893 + 970378894.

It is an arithmetic number, because the mean of its divisors is an integer number (970378894).

Almost surely, 2^1940757787 is an apocalyptic number.

1940757787 is a deficient number, since it is larger than the sum of its proper divisors (1).

1940757787 is an equidigital number, since it uses as much as digits as its factorization.

1940757787 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3457440, while the sum is 55.

The square root of 1940757787 is about 44054.0325849973. The cubic root of 1940757787 is about 1247.3560728890.

The spelling of 1940757787 in words is "one billion, nine hundred forty million, seven hundred fifty-seven thousand, seven hundred eighty-seven".