420002623 has 2 divisors, whose sum is σ = 420002624. Its totient is φ = 420002622.

The previous prime is 420002603. The next prime is 420002641. The reversal of 420002623 is 326200024.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 420002623 - 2⁵ = 420002591 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 420002623.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420002603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210001311 + 210001312.

It is an arithmetic number, because the mean of its divisors is an integer number (210001312).

Almost surely, 2^420002623 is an apocalyptic number.

420002623 is a deficient number, since it is larger than the sum of its proper divisors (1).

420002623 is an equidigital number, since it uses as much as digits as its factorization.

420002623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 420002623 is about 20493.9655264666. The cubic root of 420002623 is about 748.8887977116. Note that the first 3 decimals are identical.

Adding to 420002623 its reverse (326200024), we get a palindrome (746202647).

The spelling of 420002623 in words is "four hundred twenty million, two thousand, six hundred twenty-three".