161008157 has 2 divisors, whose sum is σ = 161008158. Its totient is φ = 161008156.

The previous prime is 161008103. The next prime is 161008171. The reversal of 161008157 is 751800161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114618436 + 46389721 = 10706^2 + 6811^2 .

It is a cyclic number.

It is not a de Polignac number, because 161008157 - 2⁶ = 161008093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161007157) 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, 80504078 + 80504079.

It is an arithmetic number, because the mean of its divisors is an integer number (80504079).

Almost surely, 2^161008157 is an apocalyptic number.

It is an amenable number.

161008157 is a deficient number, since it is larger than the sum of its proper divisors (1).

161008157 is an equidigital number, since it uses as much as digits as its factorization.

161008157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 29.

The square root of 161008157 is about 12688.8989672075. The cubic root of 161008157 is about 544.0213697722.

The spelling of 161008157 in words is "one hundred sixty-one million, eight thousand, one hundred fifty-seven".