426499991 has 8 divisors (see below), whose sum is σ = 428834304. Its totient is φ = 424172800.

The previous prime is 426499963. The next prime is 426499993. The reversal of 426499991 is 199994624.

It is a happy number.

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 426499991 - 2¹⁰ = 426498967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (426499993) 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, 152195 + ... + 154971.

It is an arithmetic number, because the mean of its divisors is an integer number (53604288).

Almost surely, 2^426499991 is an apocalyptic number.

426499991 is a deficient number, since it is larger than the sum of its proper divisors (2334313).

426499991 is a wasteful number, since it uses less digits than its factorization.

426499991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3561.

The product of its digits is 1259712, while the sum is 53.

The square root of 426499991 is about 20651.8762101655. The cubic root of 426499991 is about 752.7307804574.

The spelling of 426499991 in words is "four hundred twenty-six million, four hundred ninety-nine thousand, nine hundred ninety-one".