123912902 has 4 divisors (see below), whose sum is σ = 185869356. Its totient is φ = 61956450.

The previous prime is 123912871. The next prime is 123912907. The reversal of 123912902 is 209219321.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123912907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30978224 + ... + 30978227.

It is an arithmetic number, because the mean of its divisors is an integer number (46467339).

Almost surely, 2^123912902 is an apocalyptic number.

123912902 is a deficient number, since it is larger than the sum of its proper divisors (61956454).

123912902 is an equidigital number, since it uses as much as digits as its factorization.

123912902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61956453.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 123912902 is about 11131.6172230274. The cubic root of 123912902 is about 498.5463136881.

It can be divided in two parts, 1239 and 12902, that added together give a palindrome (14141).

The spelling of 123912902 in words is "one hundred twenty-three million, nine hundred twelve thousand, nine hundred two".