426691187 has 8 divisors (see below), whose sum is σ = 464677920. Its totient is φ = 389442240.

The previous prime is 426691169. The next prime is 426691201. The reversal of 426691187 is 781196624.

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 426691187 - 2⁸ = 426690931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (426691117) 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 7 ways as a sum of consecutive naturals, for example, 183239 + ... + 185552.

It is an arithmetic number, because the mean of its divisors is an integer number (58084740).

Almost surely, 2^426691187 is an apocalyptic number.

426691187 is a deficient number, since it is larger than the sum of its proper divisors (37986733).

426691187 is a wasteful number, since it uses less digits than its factorization.

426691187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368893.

The product of its digits is 145152, while the sum is 44.

The square root of 426691187 is about 20656.5047140120. The cubic root of 426691187 is about 752.8432444018.

The spelling of 426691187 in words is "four hundred twenty-six million, six hundred ninety-one thousand, one hundred eighty-seven".