420194031 has 4 divisors (see below), whose sum is σ = 560258712. Its totient is φ = 280129352.

The previous prime is 420194023. The next prime is 420194041. The reversal of 420194031 is 130491024.

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 420194031 - 2³ = 420194023 is a prime.

It is a super-2 number, since 2×420194031² = 353126047376057922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 420193992 and 420194010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420194011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70032336 + ... + 70032341.

It is an arithmetic number, because the mean of its divisors is an integer number (140064678).

Almost surely, 2^420194031 is an apocalyptic number.

420194031 is a deficient number, since it is larger than the sum of its proper divisors (140064681).

420194031 is a wasteful number, since it uses less digits than its factorization.

420194031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140064680.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 420194031 is about 20498.6348569850. The cubic root of 420194031 is about 749.0025442530.

The spelling of 420194031 in words is "four hundred twenty million, one hundred ninety-four thousand, thirty-one".