123049187965 has 8 divisors (see below), whose sum is σ = 161082573408. Its totient is φ = 89490318480.

The previous prime is 123049187929. The next prime is 123049187981. The reversal of 123049187965 is 569781940321.

It is a happy number.

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

It is not a de Polignac number, because 123049187965 - 2²⁷ = 122914970237 is a prime.

It is a super-2 number, since 2×123049187965² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (55), and also a Moran number because the ratio is a prime number: 2237257963 = 123049187965 / (1 + 2 + 3 + 0 + 4 + 9 + 1 + 8 + 7 + 9 + 6 + 5).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1118628927 + ... + 1118629036.

It is an arithmetic number, because the mean of its divisors is an integer number (20135321676).

It is a 1-persistent number, because it is pandigital, but 2⋅123049187965 = 246098375930 is not.

Almost surely, 2^123049187965 is an apocalyptic number.

It is an amenable number.

123049187965 is a deficient number, since it is larger than the sum of its proper divisors (38033385443).

123049187965 is a wasteful number, since it uses less digits than its factorization.

123049187965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2237257979.

The product of its (nonzero) digits is 3265920, while the sum is 55.

The spelling of 123049187965 in words is "one hundred twenty-three billion, forty-nine million, one hundred eighty-seven thousand, nine hundred sixty-five".