161954951 has 2 divisors, whose sum is σ = 161954952. Its totient is φ = 161954950.

The previous prime is 161954927. The next prime is 161954981. The reversal of 161954951 is 159459161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161954951 - 2⁶ = 161954887 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 161954899 and 161954908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161954981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80977475 + 80977476.

It is an arithmetic number, because the mean of its divisors is an integer number (80977476).

Almost surely, 2^161954951 is an apocalyptic number.

161954951 is a deficient number, since it is larger than the sum of its proper divisors (1).

161954951 is an equidigital number, since it uses as much as digits as its factorization.

161954951 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48600, while the sum is 41.

The square root of 161954951 is about 12726.1522464569. The cubic root of 161954951 is about 545.0856426308.

The spelling of 161954951 in words is "one hundred sixty-one million, nine hundred fifty-four thousand, nine hundred fifty-one".