123011957 has 2 divisors, whose sum is σ = 123011958. Its totient is φ = 123011956.

The previous prime is 123011953. The next prime is 123011969. The reversal of 123011957 is 759110321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86843761 + 36168196 = 9319^2 + 6014^2 .

It is a cyclic number.

It is not a de Polignac number, because 123011957 - 2² = 123011953 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123011951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61505978 + 61505979.

It is an arithmetic number, because the mean of its divisors is an integer number (61505979).

Almost surely, 2^123011957 is an apocalyptic number.

It is an amenable number.

123011957 is a deficient number, since it is larger than the sum of its proper divisors (1).

123011957 is an equidigital number, since it uses as much as digits as its factorization.

123011957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1890, while the sum is 29.

The square root of 123011957 is about 11091.0755565004. The cubic root of 123011957 is about 497.3350978266.

The spelling of 123011957 in words is "one hundred twenty-three million, eleven thousand, nine hundred fifty-seven".