161477623 has 2 divisors, whose sum is σ = 161477624. Its totient is φ = 161477622.

The previous prime is 161477567. The next prime is 161477627. The reversal of 161477623 is 326774161.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161477623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161477627) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80738811 + 80738812.

It is an arithmetic number, because the mean of its divisors is an integer number (80738812).

Almost surely, 2^161477623 is an apocalyptic number.

161477623 is a deficient number, since it is larger than the sum of its proper divisors (1).

161477623 is an equidigital number, since it uses as much as digits as its factorization.

161477623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42336, while the sum is 37.

The square root of 161477623 is about 12707.3845853504. The cubic root of 161477623 is about 544.5496074134.

The spelling of 161477623 in words is "one hundred sixty-one million, four hundred seventy-seven thousand, six hundred twenty-three".