1623273161 has 2 divisors, whose sum is σ = 1623273162. Its totient is φ = 1623273160.

The previous prime is 1623273149. The next prime is 1623273209. The reversal of 1623273161 is 1613723261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1576090000 + 47183161 = 39700^2 + 6869^2 .

It is a cyclic number.

It is not a de Polignac number, because 1623273161 - 2⁶ = 1623273097 is a prime.

It is not a weakly prime, because it can be changed into another prime (1623273131) 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 as a sum of consecutive naturals, namely, 811636580 + 811636581.

It is an arithmetic number, because the mean of its divisors is an integer number (811636581).

Almost surely, 2^1623273161 is an apocalyptic number.

It is an amenable number.

1623273161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1623273161 is an equidigital number, since it uses as much as digits as its factorization.

1623273161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 32.

The square root of 1623273161 is about 40289.8642464826. The cubic root of 1623273161 is about 1175.2507473916.

It can be divided in two parts, 1623273 and 161, that multiplied together give a triangular number (261346953 = T₂₂₈₆₂).

The spelling of 1623273161 in words is "one billion, six hundred twenty-three million, two hundred seventy-three thousand, one hundred sixty-one".