161498951 has 2 divisors, whose sum is σ = 161498952. Its totient is φ = 161498950.

The previous prime is 161498947. The next prime is 161498971. The reversal of 161498951 is 159894161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161498951 - 2² = 161498947 is a prime.

It is a super-2 number, since 2×161498951² = 52163822348200802, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161498921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80749475 + 80749476.

It is an arithmetic number, because the mean of its divisors is an integer number (80749476).

Almost surely, 2^161498951 is an apocalyptic number.

161498951 is a deficient number, since it is larger than the sum of its proper divisors (1).

161498951 is an equidigital number, since it uses as much as digits as its factorization.

161498951 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 44.

The square root of 161498951 is about 12708.2237547188. The cubic root of 161498951 is about 544.5735811020.

The spelling of 161498951 in words is "one hundred sixty-one million, four hundred ninety-eight thousand, nine hundred fifty-one".