123290071 has 4 divisors (see below), whose sum is σ = 125913312. Its totient is φ = 120666832.

The previous prime is 123290053. The next prime is 123290087. The reversal of 123290071 is 170092321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 123290071 - 2²³ = 114901463 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 (123290021) 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, 1311550 + ... + 1311643.

It is an arithmetic number, because the mean of its divisors is an integer number (31478328).

Almost surely, 2^123290071 is an apocalyptic number.

123290071 is a deficient number, since it is larger than the sum of its proper divisors (2623241).

123290071 is an equidigital number, since it uses as much as digits as its factorization.

123290071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2623240.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 123290071 is about 11103.6062160003. The cubic root of 123290071 is about 497.7096189964.

The spelling of 123290071 in words is "one hundred twenty-three million, two hundred ninety thousand, seventy-one".