9157442813 has 2 divisors, whose sum is σ = 9157442814. Its totient is φ = 9157442812.

The previous prime is 9157442807. The next prime is 9157442831. The reversal of 9157442813 is 3182447519.

Together with next prime (9157442831) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7471354969 + 1686087844 = 86437^2 + 41062^2 .

It is a cyclic number.

It is not a de Polignac number, because 9157442813 - 2¹⁴ = 9157426429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9157442843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4578721406 + 4578721407.

It is an arithmetic number, because the mean of its divisors is an integer number (4578721407).

Almost surely, 2^9157442813 is an apocalyptic number.

It is an amenable number.

9157442813 is a deficient number, since it is larger than the sum of its proper divisors (1).

9157442813 is an equidigital number, since it uses as much as digits as its factorization.

9157442813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 44.

The square root of 9157442813 is about 95694.5286471489. The cubic root of 9157442813 is about 2092.1431898993.

The spelling of 9157442813 in words is "nine billion, one hundred fifty-seven million, four hundred forty-two thousand, eight hundred thirteen".