123740397 has 24 divisors (see below), whose sum is σ = 196790880. Its totient is φ = 74299680.

The previous prime is 123740387. The next prime is 123740401. The reversal of 123740397 is 793047321.

It is not a de Polignac number, because 123740397 - 2⁴ = 123740381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123740327) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5058 + ... + 16524.

It is an arithmetic number, because the mean of its divisors is an integer number (8199620).

Almost surely, 2^123740397 is an apocalyptic number.

It is an amenable number.

123740397 is a deficient number, since it is larger than the sum of its proper divisors (73050483).

123740397 is a wasteful number, since it uses less digits than its factorization.

123740397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11593 (or 11590 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 36.

The square root of 123740397 is about 11123.8660995177. The cubic root of 123740397 is about 498.3148562951.

The spelling of 123740397 in words is "one hundred twenty-three million, seven hundred forty thousand, three hundred ninety-seven".