1099787957 has 2 divisors, whose sum is σ = 1099787958. Its totient is φ = 1099787956.

The previous prime is 1099787917. The next prime is 1099787989. The reversal of 1099787957 is 7597879901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 976000081 + 123787876 = 31241^2 + 11126^2 .

It is a cyclic number.

It is not a de Polignac number, because 1099787957 - 2⁸ = 1099787701 is a prime.

It is a zygodrome in base 3.

It is a self number, because there is not a number n which added to its sum of digits gives 1099787957.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1099787917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 549893978 + 549893979.

It is an arithmetic number, because the mean of its divisors is an integer number (549893979).

Almost surely, 2^1099787957 is an apocalyptic number.

It is an amenable number.

1099787957 is a deficient number, since it is larger than the sum of its proper divisors (1).

1099787957 is an equidigital number, since it uses as much as digits as its factorization.

1099787957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10001880, while the sum is 62.

The square root of 1099787957 is about 33163.0510809847. The cubic root of 1099787957 is about 1032.2137815658.

The spelling of 1099787957 in words is "one billion, ninety-nine million, seven hundred eighty-seven thousand, nine hundred fifty-seven".