161717051 has 2 divisors, whose sum is σ = 161717052. Its totient is φ = 161717050.

The previous prime is 161716991. The next prime is 161717057. The reversal of 161717051 is 150717161.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161717051 is a prime.

It is not a weakly prime, because it can be changed into another prime (161717057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80858525 + 80858526.

It is an arithmetic number, because the mean of its divisors is an integer number (80858526).

Almost surely, 2^161717051 is an apocalyptic number.

161717051 is a deficient number, since it is larger than the sum of its proper divisors (1).

161717051 is an equidigital number, since it uses as much as digits as its factorization.

161717051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1470, while the sum is 29.

The square root of 161717051 is about 12716.8019171488. The cubic root of 161717051 is about 544.8186148344.

The spelling of 161717051 in words is "one hundred sixty-one million, seven hundred seventeen thousand, fifty-one".