123036391 has 2 divisors, whose sum is σ = 123036392. Its totient is φ = 123036390.

The previous prime is 123036377. The next prime is 123036413. The reversal of 123036391 is 193630321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123036391 - 2¹¹ = 123034343 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123036311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61518195 + 61518196.

It is an arithmetic number, because the mean of its divisors is an integer number (61518196).

Almost surely, 2^123036391 is an apocalyptic number.

123036391 is a deficient number, since it is larger than the sum of its proper divisors (1).

123036391 is an equidigital number, since it uses as much as digits as its factorization.

123036391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 28.

The square root of 123036391 is about 11092.1770180610. The cubic root of 123036391 is about 497.3680243854.

The spelling of 123036391 in words is "one hundred twenty-three million, thirty-six thousand, three hundred ninety-one".