161123929 has 2 divisors, whose sum is σ = 161123930. Its totient is φ = 161123928.

The previous prime is 161123903. The next prime is 161123953. The reversal of 161123929 is 929321161.

161123929 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131148304 + 29975625 = 11452^2 + 5475^2 .

It is a cyclic number.

It is not a de Polignac number, because 161123929 - 2²³ = 152735321 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161123894 and 161123903.

It is not a weakly prime, because it can be changed into another prime (161123029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80561964 + 80561965.

It is an arithmetic number, because the mean of its divisors is an integer number (80561965).

Almost surely, 2^161123929 is an apocalyptic number.

It is an amenable number.

161123929 is a deficient number, since it is larger than the sum of its proper divisors (1).

161123929 is an equidigital number, since it uses as much as digits as its factorization.

161123929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5832, while the sum is 34.

The square root of 161123929 is about 12693.4600877775. The cubic root of 161123929 is about 544.1517303566.

The spelling of 161123929 in words is "one hundred sixty-one million, one hundred twenty-three thousand, nine hundred twenty-nine".