420057293 has 4 divisors (see below), whose sum is σ = 421860348. Its totient is φ = 418254240.

The previous prime is 420057251. The next prime is 420057311. The reversal of 420057293 is 392750024.

It is a happy number.

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 216766729 + 203290564 = 14723^2 + 14258^2 .

It is a cyclic number.

It is not a de Polignac number, because 420057293 - 2¹⁶ = 419991757 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 (420057203) 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, 901178 + ... + 901643.

It is an arithmetic number, because the mean of its divisors is an integer number (105465087).

Almost surely, 2^420057293 is an apocalyptic number.

It is an amenable number.

420057293 is a deficient number, since it is larger than the sum of its proper divisors (1803055).

420057293 is a wasteful number, since it uses less digits than its factorization.

420057293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1803054.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 420057293 is about 20495.2992903251. The cubic root of 420057293 is about 748.9212895518.

The spelling of 420057293 in words is "four hundred twenty million, fifty-seven thousand, two hundred ninety-three".