123690217 has 8 divisors (see below), whose sum is σ = 145920512. Its totient is φ = 102600000.

The previous prime is 123690197. The next prime is 123690227. The reversal of 123690217 is 712096321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 123690217 - 2¹⁵ = 123657449 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123690227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 284784 + ... + 285217.

It is an arithmetic number, because the mean of its divisors is an integer number (18240064).

Almost surely, 2^123690217 is an apocalyptic number.

It is an amenable number.

123690217 is a deficient number, since it is larger than the sum of its proper divisors (22230295).

123690217 is an equidigital number, since it uses as much as digits as its factorization.

123690217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570039.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 123690217 is about 11121.6103600153. The cubic root of 123690217 is about 498.2474872414.

The spelling of 123690217 in words is "one hundred twenty-three million, six hundred ninety thousand, two hundred seventeen".