157156691 has 2 divisors, whose sum is σ = 157156692. Its totient is φ = 157156690.

The previous prime is 157156669. The next prime is 157156711. The reversal of 157156691 is 196651751.

It is a strong prime.

It is an emirp because it is prime and its reverse (196651751) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157156691 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (157156621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78578345 + 78578346.

It is an arithmetic number, because the mean of its divisors is an integer number (78578346).

Almost surely, 2^157156691 is an apocalyptic number.

157156691 is a deficient number, since it is larger than the sum of its proper divisors (1).

157156691 is an equidigital number, since it uses as much as digits as its factorization.

157156691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56700, while the sum is 41.

The square root of 157156691 is about 12536.2151784340. The cubic root of 157156691 is about 539.6484806433.

The spelling of 157156691 in words is "one hundred fifty-seven million, one hundred fifty-six thousand, six hundred ninety-one".