123402013 has 4 divisors (see below), whose sum is σ = 141030880. Its totient is φ = 105773148.

The previous prime is 123402011. The next prime is 123402023. The reversal of 123402013 is 310204321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 123402013 - 2¹ = 123402011 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 (123402011) 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, 8814423 + ... + 8814436.

It is an arithmetic number, because the mean of its divisors is an integer number (35257720).

Almost surely, 2^123402013 is an apocalyptic number.

It is an amenable number.

123402013 is a deficient number, since it is larger than the sum of its proper divisors (17628867).

123402013 is an equidigital number, since it uses as much as digits as its factorization.

123402013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17628866.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 123402013 is about 11108.6458670713. The cubic root of 123402013 is about 497.8602062958.

Adding to 123402013 its reverse (310204321), we get a palindrome (433606334).

The spelling of 123402013 in words is "one hundred twenty-three million, four hundred two thousand, thirteen".