1111949557 has 2 divisors, whose sum is σ = 1111949558. Its totient is φ = 1111949556.

The previous prime is 1111949537. The next prime is 1111949623. The reversal of 1111949557 is 7559491111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1001152881 + 110796676 = 31641^2 + 10526^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1111949557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1111949507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555974778 + 555974779.

It is an arithmetic number, because the mean of its divisors is an integer number (555974779).

Almost surely, 2^1111949557 is an apocalyptic number.

It is an amenable number.

1111949557 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111949557 is an equidigital number, since it uses as much as digits as its factorization.

1111949557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56700, while the sum is 43.

The square root of 1111949557 is about 33345.9076499651. The cubic root of 1111949557 is about 1036.0046277800.

The spelling of 1111949557 in words is "one billion, one hundred eleven million, nine hundred forty-nine thousand, five hundred fifty-seven".