426149987 has 4 divisors (see below), whose sum is σ = 435217056. Its totient is φ = 417082920.

The previous prime is 426149981. The next prime is 426149989. The reversal of 426149987 is 789941624.

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 426149987 - 2⁶ = 426149923 is a prime.

It is a super-2 number, since 2×426149987² = 363207622840200338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (426149981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4533464 + ... + 4533557.

It is an arithmetic number, because the mean of its divisors is an integer number (108804264).

Almost surely, 2^426149987 is an apocalyptic number.

426149987 is a gapful number since it is divisible by the number (47) formed by its first and last digit.

426149987 is a deficient number, since it is larger than the sum of its proper divisors (9067069).

426149987 is an equidigital number, since it uses as much as digits as its factorization.

426149987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9067068.

The product of its digits is 870912, while the sum is 50.

The square root of 426149987 is about 20643.4005677359. The cubic root of 426149987 is about 752.5248164941.

The spelling of 426149987 in words is "four hundred twenty-six million, one hundred forty-nine thousand, nine hundred eighty-seven".