420403123313 has 4 divisors (see below), whose sum is σ = 445132718820. Its totient is φ = 395673527808.

The previous prime is 420403123277. The next prime is 420403123337. The reversal of 420403123313 is 313321304024.

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

It can be written as a sum of positive squares in 2 ways, for example, as 252935567329 + 167467555984 = 502927^2 + 409228^2 .

It is a cyclic number.

It is not a de Polignac number, because 420403123313 - 2²² = 420398929009 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (420403123013) 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, 12364797728 + ... + 12364797761.

It is an arithmetic number, because the mean of its divisors is an integer number (111283179705).

Almost surely, 2^420403123313 is an apocalyptic number.

It is an amenable number.

420403123313 is a deficient number, since it is larger than the sum of its proper divisors (24729595507).

420403123313 is a wasteful number, since it uses less digits than its factorization.

420403123313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24729595506.

The product of its (nonzero) digits is 5184, while the sum is 26.

Adding to 420403123313 its reverse (313321304024), we get a palindrome (733724427337).

The spelling of 420403123313 in words is "four hundred twenty billion, four hundred three million, one hundred twenty-three thousand, three hundred thirteen".