1996849157 has 2 divisors, whose sum is σ = 1996849158. Its totient is φ = 1996849156.

The previous prime is 1996849111. The next prime is 1996849163. The reversal of 1996849157 is 7519486991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1505517601 + 491331556 = 38801^2 + 22166^2 .

It is a cyclic number.

It is not a de Polignac number, because 1996849157 - 2⁸ = 1996848901 is a prime.

It is a super-2 number, since 2×1996849157² = 7974813111623221298, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1996849096 and 1996849105.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1996843157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 998424578 + 998424579.

It is an arithmetic number, because the mean of its divisors is an integer number (998424579).

Almost surely, 2^1996849157 is an apocalyptic number.

It is an amenable number.

1996849157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1996849157 is an equidigital number, since it uses as much as digits as its factorization.

1996849157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4898880, while the sum is 59.

The square root of 1996849157 is about 44686.1181688452. The cubic root of 1996849157 is about 1259.2590665687.

The spelling of 1996849157 in words is "one billion, nine hundred ninety-six million, eight hundred forty-nine thousand, one hundred fifty-seven".