161477723 has 8 divisors (see below), whose sum is σ = 177774960. Its totient is φ = 145450080.

The previous prime is 161477683. The next prime is 161477753. The reversal of 161477723 is 327774161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161477723 - 2⁸ = 161477467 is a prime.

It is a super-3 number, since 3×161477723³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (161477753) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66140 + ... + 68537.

It is an arithmetic number, because the mean of its divisors is an integer number (22221870).

Almost surely, 2^161477723 is an apocalyptic number.

161477723 is a deficient number, since it is larger than the sum of its proper divisors (16297237).

161477723 is a wasteful number, since it uses less digits than its factorization.

161477723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134797.

The product of its digits is 49392, while the sum is 38.

The square root of 161477723 is about 12707.3885200697. The cubic root of 161477723 is about 544.5497198231.

The spelling of 161477723 in words is "one hundred sixty-one million, four hundred seventy-seven thousand, seven hundred twenty-three".