157198193 has 2 divisors, whose sum is σ = 157198194. Its totient is φ = 157198192.

The previous prime is 157198121. The next prime is 157198213. The reversal of 157198193 is 391891751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143233024 + 13965169 = 11968^2 + 3737^2 .

It is a cyclic number.

It is not a de Polignac number, because 157198193 - 2¹² = 157194097 is a prime.

It is a super-2 number, since 2×157198193² = 49422543764930498, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (157198493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78599096 + 78599097.

It is an arithmetic number, because the mean of its divisors is an integer number (78599097).

Almost surely, 2^157198193 is an apocalyptic number.

It is an amenable number.

157198193 is a deficient number, since it is larger than the sum of its proper divisors (1).

157198193 is an equidigital number, since it uses as much as digits as its factorization.

157198193 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68040, while the sum is 44.

The square root of 157198193 is about 12537.8703534532. The cubic root of 157198193 is about 539.6959799891.

The spelling of 157198193 in words is "one hundred fifty-seven million, one hundred ninety-eight thousand, one hundred ninety-three".