161098631 has 2 divisors, whose sum is σ = 161098632. Its totient is φ = 161098630.

The previous prime is 161098607. The next prime is 161098649. The reversal of 161098631 is 136890161.

161098631 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161098631 is a prime.

It is a super-2 number, since 2×161098631² = 51905537820148322, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 161098591 and 161098600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161095631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80549315 + 80549316.

It is an arithmetic number, because the mean of its divisors is an integer number (80549316).

Almost surely, 2^161098631 is an apocalyptic number.

161098631 is a deficient number, since it is larger than the sum of its proper divisors (1).

161098631 is an equidigital number, since it uses as much as digits as its factorization.

161098631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 161098631 is about 12692.4635512575. The cubic root of 161098631 is about 544.1232498549.

The spelling of 161098631 in words is "one hundred sixty-one million, ninety-eight thousand, six hundred thirty-one".