421613723 has 2 divisors, whose sum is σ = 421613724. Its totient is φ = 421613722.

The previous prime is 421613707. The next prime is 421613729. The reversal of 421613723 is 327316124.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 421613723 - 2⁴ = 421613707 is a prime.

It is not a weakly prime, because it can be changed into another prime (421613729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210806861 + 210806862.

It is an arithmetic number, because the mean of its divisors is an integer number (210806862).

Almost surely, 2^421613723 is an apocalyptic number.

421613723 is a deficient number, since it is larger than the sum of its proper divisors (1).

421613723 is an equidigital number, since it uses as much as digits as its factorization.

421613723 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 29.

The square root of 421613723 is about 20533.2345966241. The cubic root of 421613723 is about 749.8451372107.

Adding to 421613723 its reverse (327316124), we get a palindrome (748929847).

The spelling of 421613723 in words is "four hundred twenty-one million, six hundred thirteen thousand, seven hundred twenty-three".