1056198149 has 2 divisors, whose sum is σ = 1056198150. Its totient is φ = 1056198148.

The previous prime is 1056198137. The next prime is 1056198173. The reversal of 1056198149 is 9418916501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 614147524 + 442050625 = 24782^2 + 21025^2 .

It is an emirp because it is prime and its reverse (9418916501) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1056198149 - 2²⁸ = 787762693 is a prime.

It is a super-2 number, since 2×1056198149² = 2231109059902052402, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1056192149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 528099074 + 528099075.

It is an arithmetic number, because the mean of its divisors is an integer number (528099075).

Almost surely, 2^1056198149 is an apocalyptic number.

It is an amenable number.

1056198149 is a deficient number, since it is larger than the sum of its proper divisors (1).

1056198149 is an equidigital number, since it uses as much as digits as its factorization.

1056198149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 44.

The square root of 1056198149 is about 32499.2022825176. The cubic root of 1056198149 is about 1018.3923633855.

The spelling of 1056198149 in words is "one billion, fifty-six million, one hundred ninety-eight thousand, one hundred forty-nine".