123477581 has 2 divisors, whose sum is σ = 123477582. Its totient is φ = 123477580.

The previous prime is 123477569. The next prime is 123477611. The reversal of 123477581 is 185774321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71132356 + 52345225 = 8434^2 + 7235^2 .

It is a cyclic number.

It is not a de Polignac number, because 123477581 - 2²² = 119283277 is a prime.

It is a super-2 number, since 2×123477581² = 30493426019223122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123477551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61738790 + 61738791.

It is an arithmetic number, because the mean of its divisors is an integer number (61738791).

Almost surely, 2^123477581 is an apocalyptic number.

It is an amenable number.

123477581 is a deficient number, since it is larger than the sum of its proper divisors (1).

123477581 is an equidigital number, since it uses as much as digits as its factorization.

123477581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47040, while the sum is 38.

The square root of 123477581 is about 11112.0466611691. The cubic root of 123477581 is about 497.9618108595.

The spelling of 123477581 in words is "one hundred twenty-three million, four hundred seventy-seven thousand, five hundred eighty-one".