420766693 has 4 divisors (see below), whose sum is σ = 424699200. Its totient is φ = 416834188.

The previous prime is 420766691. The next prime is 420766721. The reversal of 420766693 is 396667024.

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 420766693 - 2¹ = 420766691 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 (420766691) 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, 1966093 + ... + 1966306.

It is an arithmetic number, because the mean of its divisors is an integer number (106174800).

Almost surely, 2^420766693 is an apocalyptic number.

It is an amenable number.

420766693 is a deficient number, since it is larger than the sum of its proper divisors (3932507).

420766693 is a wasteful number, since it uses less digits than its factorization.

420766693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3932506.

The product of its (nonzero) digits is 326592, while the sum is 43.

The square root of 420766693 is about 20512.5983970827. The cubic root of 420766693 is about 749.3426495036.

The spelling of 420766693 in words is "four hundred twenty million, seven hundred sixty-six thousand, six hundred ninety-three".