161494949 has 12 divisors (see below), whose sum is σ = 202870752. Its totient is φ = 125839560.

The previous prime is 161494933. The next prime is 161494979. The reversal of 161494949 is 949494161.

It is a happy number.

It is not a de Polignac number, because 161494949 - 2⁴ = 161494933 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161494919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 94487 + ... + 96180.

It is an arithmetic number, because the mean of its divisors is an integer number (16905896).

Almost surely, 2^161494949 is an apocalyptic number.

It is an amenable number.

161494949 is a deficient number, since it is larger than the sum of its proper divisors (41375803).

161494949 is a wasteful number, since it uses less digits than its factorization.

161494949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190696 (or 190685 counting only the distinct ones).

The product of its digits is 279936, while the sum is 47.

The square root of 161494949 is about 12708.0662966480. The cubic root of 161494949 is about 544.5690828241.

The spelling of 161494949 in words is "one hundred sixty-one million, four hundred ninety-four thousand, nine hundred forty-nine".