161025973 has 2 divisors, whose sum is σ = 161025974. Its totient is φ = 161025972.

The previous prime is 161025923. The next prime is 161026003. The reversal of 161025973 is 379520161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97950609 + 63075364 = 9897^2 + 7942^2 .

It is an emirp because it is prime and its reverse (379520161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161025973 - 2¹⁷ = 160894901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161025923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80512986 + 80512987.

It is an arithmetic number, because the mean of its divisors is an integer number (80512987).

Almost surely, 2^161025973 is an apocalyptic number.

It is an amenable number.

161025973 is a deficient number, since it is larger than the sum of its proper divisors (1).

161025973 is an equidigital number, since it uses as much as digits as its factorization.

161025973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340, while the sum is 34.

The square root of 161025973 is about 12689.6009787542. The cubic root of 161025973 is about 544.0414348576.

The spelling of 161025973 in words is "one hundred sixty-one million, twenty-five thousand, nine hundred seventy-three".