420683557 has 16 divisors (see below), whose sum is σ = 484709760. Its totient is φ = 357654528.

The previous prime is 420683539. The next prime is 420683561. The reversal of 420683557 is 755386024.

It is a de Polignac number, because none of the positive numbers 2^k-420683557 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 (420683507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 681513 + ... + 682129.

It is an arithmetic number, because the mean of its divisors is an integer number (30294360).

Almost surely, 2^420683557 is an apocalyptic number.

It is an amenable number.

420683557 is a deficient number, since it is larger than the sum of its proper divisors (64026203).

420683557 is a wasteful number, since it uses less digits than its factorization.

420683557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1260.

The product of its (nonzero) digits is 201600, while the sum is 40.

The square root of 420683557 is about 20510.5718350318. The cubic root of 420683557 is about 749.2932940017.

The spelling of 420683557 in words is "four hundred twenty million, six hundred eighty-three thousand, five hundred fifty-seven".