420753407 has 4 divisors (see below), whose sum is σ = 424613640. Its totient is φ = 416893176.

The previous prime is 420753401. The next prime is 420753479. The reversal of 420753407 is 704357024.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 420753407 - 2¹⁰ = 420752383 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 (420753401) 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, 1929953 + ... + 1930170.

It is an arithmetic number, because the mean of its divisors is an integer number (106153410).

Almost surely, 2^420753407 is an apocalyptic number.

420753407 is a deficient number, since it is larger than the sum of its proper divisors (3860233).

420753407 is a wasteful number, since it uses less digits than its factorization.

420753407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3860232.

The product of its (nonzero) digits is 23520, while the sum is 32.

The square root of 420753407 is about 20512.2745447695. The cubic root of 420753407 is about 749.3347624160.

The spelling of 420753407 in words is "four hundred twenty million, seven hundred fifty-three thousand, four hundred seven".