420691173 has 32 divisors (see below), whose sum is σ = 666918912. Its totient is φ = 230817600.

The previous prime is 420691153. The next prime is 420691177. The reversal of 420691173 is 371196024.

It is not a de Polignac number, because 420691173 - 2²⁶ = 353582309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420691177) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 82815 + ... + 87747.

It is an arithmetic number, because the mean of its divisors is an integer number (20841216).

Almost surely, 2^420691173 is an apocalyptic number.

It is an amenable number.

420691173 is a deficient number, since it is larger than the sum of its proper divisors (246227739).

420691173 is a wasteful number, since it uses less digits than its factorization.

420691173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5105.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 420691173 is about 20510.7574945442. The cubic root of 420691173 is about 749.2978156770.

The spelling of 420691173 in words is "four hundred twenty million, six hundred ninety-one thousand, one hundred seventy-three".