161873357 has 2 divisors, whose sum is σ = 161873358. Its totient is φ = 161873356.

The previous prime is 161873329. The next prime is 161873363. The reversal of 161873357 is 753378161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 160250281 + 1623076 = 12659^2 + 1274^2 .

It is a cyclic number.

It is not a de Polignac number, because 161873357 - 2¹⁸ = 161611213 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161873317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80936678 + 80936679.

It is an arithmetic number, because the mean of its divisors is an integer number (80936679).

Almost surely, 2^161873357 is an apocalyptic number.

It is an amenable number.

161873357 is a deficient number, since it is larger than the sum of its proper divisors (1).

161873357 is an equidigital number, since it uses as much as digits as its factorization.

161873357 is an evil number, because the sum of its binary digits is even.

The product of its digits is 105840, while the sum is 41.

The square root of 161873357 is about 12722.9460817847. The cubic root of 161873357 is about 544.9940879756.

The spelling of 161873357 in words is "one hundred sixty-one million, eight hundred seventy-three thousand, three hundred fifty-seven".