157643743 has 2 divisors, whose sum is σ = 157643744. Its totient is φ = 157643742.

The previous prime is 157643671. The next prime is 157643819. The reversal of 157643743 is 347346751.

It is a weak prime.

It is an emirp because it is prime and its reverse (347346751) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157643743 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 157643696 and 157643705.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157644743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78821871 + 78821872.

It is an arithmetic number, because the mean of its divisors is an integer number (78821872).

Almost surely, 2^157643743 is an apocalyptic number.

157643743 is a deficient number, since it is larger than the sum of its proper divisors (1).

157643743 is an equidigital number, since it uses as much as digits as its factorization.

157643743 is an evil number, because the sum of its binary digits is even.

The product of its digits is 211680, while the sum is 40.

The square root of 157643743 is about 12555.6259501468. The cubic root of 157643743 is about 540.2053894055.

The spelling of 157643743 in words is "one hundred fifty-seven million, six hundred forty-three thousand, seven hundred forty-three".