1831089157 has 2 divisors, whose sum is σ = 1831089158. Its totient is φ = 1831089156.

The previous prime is 1831089137. The next prime is 1831089229. The reversal of 1831089157 is 7519801381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1091575521 + 739513636 = 33039^2 + 27194^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1831089157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1831089137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 915544578 + 915544579.

It is an arithmetic number, because the mean of its divisors is an integer number (915544579).

Almost surely, 2^1831089157 is an apocalyptic number.

It is an amenable number.

1831089157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1831089157 is an equidigital number, since it uses as much as digits as its factorization.

1831089157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 43.

The square root of 1831089157 is about 42791.2275706131. The cubic root of 1831089157 is about 1223.4038146046.

The spelling of 1831089157 in words is "one billion, eight hundred thirty-one million, eighty-nine thousand, one hundred fifty-seven".