426996981 has 8 divisors (see below), whose sum is σ = 632588160. Its totient is φ = 284664636.

The previous prime is 426996979. The next prime is 426997003. The reversal of 426996981 is 189699624.

It is not a de Polignac number, because 426996981 - 2¹ = 426996979 is a prime.

It is a super-2 number, since 2×426996981² = 364652843566228722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (426996901) 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, 7907325 + ... + 7907378.

It is an arithmetic number, because the mean of its divisors is an integer number (79073520).

Almost surely, 2^426996981 is an apocalyptic number.

It is an amenable number.

426996981 is a deficient number, since it is larger than the sum of its proper divisors (205591179).

426996981 is a wasteful number, since it uses less digits than its factorization.

426996981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15814712 (or 15814706 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 54.

The square root of 426996981 is about 20663.9052698177. The cubic root of 426996981 is about 753.0230465478.

The spelling of 426996981 in words is "four hundred twenty-six million, nine hundred ninety-six thousand, nine hundred eighty-one".