420866731 has 8 divisors (see below), whose sum is σ = 427714560. Its totient is φ = 414035688.

The previous prime is 420866711. The next prime is 420866737. The reversal of 420866731 is 137668024.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 420866731 - 2¹¹ = 420864683 is a prime.

It is a super-2 number, since 2×420866731² = 354257610525252722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420866737) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52470 + ... + 59956.

It is an arithmetic number, because the mean of its divisors is an integer number (53464320).

Almost surely, 2^420866731 is an apocalyptic number.

420866731 is a deficient number, since it is larger than the sum of its proper divisors (6847829).

420866731 is an equidigital number, since it uses as much as digits as its factorization.

420866731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8393.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 420866731 is about 20515.0367048173. The cubic root of 420866731 is about 749.4020306295.

The spelling of 420866731 in words is "four hundred twenty million, eight hundred sixty-six thousand, seven hundred thirty-one".