161659357 has 2 divisors, whose sum is σ = 161659358. Its totient is φ = 161659356.

The previous prime is 161659339. The next prime is 161659373. The reversal of 161659357 is 753956161.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85026841 + 76632516 = 9221^2 + 8754^2 .

It is a cyclic number.

It is not a de Polignac number, because 161659357 - 2²³ = 153270749 is a prime.

It is a super-2 number, since 2×161659357² = 52267495411306898, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161659397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80829678 + 80829679.

It is an arithmetic number, because the mean of its divisors is an integer number (80829679).

Almost surely, 2^161659357 is an apocalyptic number.

It is an amenable number.

161659357 is a deficient number, since it is larger than the sum of its proper divisors (1).

161659357 is an equidigital number, since it uses as much as digits as its factorization.

161659357 is an evil number, because the sum of its binary digits is even.

The product of its digits is 170100, while the sum is 43.

The square root of 161659357 is about 12714.5332985525. The cubic root of 161659357 is about 544.7538174950.

The spelling of 161659357 in words is "one hundred sixty-one million, six hundred fifty-nine thousand, three hundred fifty-seven".