123191497 has 16 divisors (see below), whose sum is σ = 152349120. Its totient is φ = 97934400.

The previous prime is 123191491. The next prime is 123191501. The reversal of 123191497 is 794191321.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123191497 is a prime.

It is a super-2 number, since 2×123191497² = 30352289866202018, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (123191491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19954 + ... + 25387.

It is an arithmetic number, because the mean of its divisors is an integer number (9521820).

Almost surely, 2^123191497 is an apocalyptic number.

It is an amenable number.

123191497 is a deficient number, since it is larger than the sum of its proper divisors (29157623).

123191497 is a wasteful number, since it uses less digits than its factorization.

123191497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45384.

The product of its digits is 13608, while the sum is 37.

The square root of 123191497 is about 11099.1665002378. The cubic root of 123191497 is about 497.5769391877.

The spelling of 123191497 in words is "one hundred twenty-three million, one hundred ninety-one thousand, four hundred ninety-seven".