157918643 has 2 divisors, whose sum is σ = 157918644. Its totient is φ = 157918642.

The previous prime is 157918597. The next prime is 157918687. The reversal of 157918643 is 346819751.

It is an a-pointer prime, because the next prime (157918687) can be obtained adding 157918643 to its sum of digits (44).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 157918643 - 2¹⁰ = 157917619 is a prime.

It is a super-2 number, since 2×157918643² = 49876595613922898, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 157918594 and 157918603.

It is not a weakly prime, because it can be changed into another prime (157918843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78959321 + 78959322.

It is an arithmetic number, because the mean of its divisors is an integer number (78959322).

Almost surely, 2^157918643 is an apocalyptic number.

157918643 is a deficient number, since it is larger than the sum of its proper divisors (1).

157918643 is an equidigital number, since it uses as much as digits as its factorization.

157918643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 44.

The square root of 157918643 is about 12566.5684655756. The cubic root of 157918643 is about 540.5192114079.

The spelling of 157918643 in words is "one hundred fifty-seven million, nine hundred eighteen thousand, six hundred forty-three".