123040397 has 4 divisors (see below), whose sum is σ = 123062880. Its totient is φ = 123017916.

The previous prime is 123040343. The next prime is 123040403. The reversal of 123040397 is 793040321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 123040397 - 2²² = 118846093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123040327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2888 + ... + 15950.

It is an arithmetic number, because the mean of its divisors is an integer number (30765720).

Almost surely, 2^123040397 is an apocalyptic number.

It is an amenable number.

123040397 is a deficient number, since it is larger than the sum of its proper divisors (22483).

123040397 is an equidigital number, since it uses as much as digits as its factorization.

123040397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22482.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 123040397 is about 11092.3575943079. The cubic root of 123040397 is about 497.3734223403.

The spelling of 123040397 in words is "one hundred twenty-three million, forty thousand, three hundred ninety-seven".