123001391 has 2 divisors, whose sum is σ = 123001392. Its totient is φ = 123001390.

The previous prime is 123001379. The next prime is 123001453. The reversal of 123001391 is 193100321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123001391 - 2¹⁴ = 122985007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123001301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61500695 + 61500696.

It is an arithmetic number, because the mean of its divisors is an integer number (61500696).

Almost surely, 2^123001391 is an apocalyptic number.

123001391 is a deficient number, since it is larger than the sum of its proper divisors (1).

123001391 is an equidigital number, since it uses as much as digits as its factorization.

123001391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 123001391 is about 11090.5992173552. The cubic root of 123001391 is about 497.3208580372.

The spelling of 123001391 in words is "one hundred twenty-three million, one thousand, three hundred ninety-one".