420005693 has 4 divisors (see below), whose sum is σ = 420614208. Its totient is φ = 419397180.

The previous prime is 420005657. The next prime is 420005699. The reversal of 420005693 is 396500024.

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 420005693 - 2⁸ = 420005437 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 (420005699) 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, 303221 + ... + 304602.

It is an arithmetic number, because the mean of its divisors is an integer number (105153552).

Almost surely, 2^420005693 is an apocalyptic number.

It is an amenable number.

420005693 is a deficient number, since it is larger than the sum of its proper divisors (608515).

420005693 is an equidigital number, since it uses as much as digits as its factorization.

420005693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608514.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 420005693 is about 20494.0404264264. The cubic root of 420005693 is about 748.8906223693.

The spelling of 420005693 in words is "four hundred twenty million, five thousand, six hundred ninety-three".