161037971 has 2 divisors, whose sum is σ = 161037972. Its totient is φ = 161037970.

The previous prime is 161037953. The next prime is 161037983. The reversal of 161037971 is 179730161.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 161037971 - 2¹⁰ = 161036947 is a prime.

It is not a weakly prime, because it can be changed into another prime (161037911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80518985 + 80518986.

It is an arithmetic number, because the mean of its divisors is an integer number (80518986).

Almost surely, 2^161037971 is an apocalyptic number.

161037971 is a deficient number, since it is larger than the sum of its proper divisors (1).

161037971 is an equidigital number, since it uses as much as digits as its factorization.

161037971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7938, while the sum is 35.

The square root of 161037971 is about 12690.0737192500. The cubic root of 161037971 is about 544.0549466468.

The spelling of 161037971 in words is "one hundred sixty-one million, thirty-seven thousand, nine hundred seventy-one".