891527113 has 2 divisors, whose sum is σ = 891527114. Its totient is φ = 891527112.

The previous prime is 891527059. The next prime is 891527137. The reversal of 891527113 is 311725198.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 788037184 + 103489929 = 28072^2 + 10173^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-891527113 is a prime.

It is a super-2 number, since 2×891527113² = 1589641186428229538, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (891525113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 445763556 + 445763557.

It is an arithmetic number, because the mean of its divisors is an integer number (445763557).

Almost surely, 2^891527113 is an apocalyptic number.

It is an amenable number.

891527113 is a deficient number, since it is larger than the sum of its proper divisors (1).

891527113 is an equidigital number, since it uses as much as digits as its factorization.

891527113 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 37.

The square root of 891527113 is about 29858.4512826771. The cubic root of 891527113 is about 962.4500183862.

The spelling of 891527113 in words is "eight hundred ninety-one million, five hundred twenty-seven thousand, one hundred thirteen".