1623087881 has 2 divisors, whose sum is σ = 1623087882. Its totient is φ = 1623087880.

The previous prime is 1623087853. The next prime is 1623087889. The reversal of 1623087881 is 1887803261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 952277881 + 670810000 = 30859^2 + 25900^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1623087881 is a prime.

It is a super-2 number, since 2×1623087881² = 5268828538898140322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1623087889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 811543940 + 811543941.

It is an arithmetic number, because the mean of its divisors is an integer number (811543941).

Almost surely, 2^1623087881 is an apocalyptic number.

It is an amenable number.

1623087881 is a deficient number, since it is larger than the sum of its proper divisors (1).

1623087881 is an equidigital number, since it uses as much as digits as its factorization.

1623087881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129024, while the sum is 44.

The square root of 1623087881 is about 40287.5648432615. The cubic root of 1623087881 is about 1175.2060314130.

The spelling of 1623087881 in words is "one billion, six hundred twenty-three million, eighty-seven thousand, eight hundred eighty-one".