157812643 has 2 divisors, whose sum is σ = 157812644. Its totient is φ = 157812642.

The previous prime is 157812607. The next prime is 157812647. The reversal of 157812643 is 346218751.

It is a strong prime.

It is an emirp because it is prime and its reverse (346218751) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 157812643 - 2²¹ = 155715491 is a prime.

It is not a weakly prime, because it can be changed into another prime (157812647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78906321 + 78906322.

It is an arithmetic number, because the mean of its divisors is an integer number (78906322).

Almost surely, 2^157812643 is an apocalyptic number.

157812643 is a deficient number, since it is larger than the sum of its proper divisors (1).

157812643 is an equidigital number, since it uses as much as digits as its factorization.

157812643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 37.

The square root of 157812643 is about 12562.3502180126. The cubic root of 157812643 is about 540.3982464614.

The spelling of 157812643 in words is "one hundred fifty-seven million, eight hundred twelve thousand, six hundred forty-three".