161469497 has 4 divisors (see below), whose sum is σ = 184536576. Its totient is φ = 138402420.

The previous prime is 161469491. The next prime is 161469509. The reversal of 161469497 is 794964161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 161469497 - 2⁴ = 161469481 is a prime.

It is a super-2 number, since 2×161469497² = 52144796922866018, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161469491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11533529 + ... + 11533542.

It is an arithmetic number, because the mean of its divisors is an integer number (46134144).

Almost surely, 2^161469497 is an apocalyptic number.

It is an amenable number.

161469497 is a deficient number, since it is larger than the sum of its proper divisors (23067079).

161469497 is an equidigital number, since it uses as much as digits as its factorization.

161469497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23067078.

The product of its digits is 326592, while the sum is 47.

The square root of 161469497 is about 12707.0648459823. The cubic root of 161469497 is about 544.5404728468.

The spelling of 161469497 in words is "one hundred sixty-one million, four hundred sixty-nine thousand, four hundred ninety-seven".