1940814157 has 2 divisors, whose sum is σ = 1940814158. Its totient is φ = 1940814156.

The previous prime is 1940814143. The next prime is 1940814191. The reversal of 1940814157 is 7514180491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1808885961 + 131928196 = 42531^2 + 11486^2 .

It is an emirp because it is prime and its reverse (7514180491) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1940814157 - 2¹⁵ = 1940781389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1940814137) 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, 970407078 + 970407079.

It is an arithmetic number, because the mean of its divisors is an integer number (970407079).

Almost surely, 2^1940814157 is an apocalyptic number.

It is an amenable number.

1940814157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1940814157 is an equidigital number, since it uses as much as digits as its factorization.

1940814157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 40.

The square root of 1940814157 is about 44054.6723628720. The cubic root of 1940814157 is about 1247.3681494057.

The spelling of 1940814157 in words is "one billion, nine hundred forty million, eight hundred fourteen thousand, one hundred fifty-seven".