426903993 has 16 divisors (see below), whose sum is σ = 632768640. Its totient is φ = 284459472.

The previous prime is 426903991. The next prime is 426904003. The reversal of 426903993 is 399309624.

It is not a de Polignac number, because 426903993 - 2¹ = 426903991 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (426903991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102255 + ... + 106347.

It is an arithmetic number, because the mean of its divisors is an integer number (39548040).

Almost surely, 2^426903993 is an apocalyptic number.

It is an amenable number.

426903993 is a deficient number, since it is larger than the sum of its proper divisors (205864647).

426903993 is a wasteful number, since it uses less digits than its factorization.

426903993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7965 (or 7959 counting only the distinct ones).

The product of its (nonzero) digits is 314928, while the sum is 45.

The square root of 426903993 is about 20661.6551369923. The cubic root of 426903993 is about 752.9683801265.

The spelling of 426903993 in words is "four hundred twenty-six million, nine hundred three thousand, nine hundred ninety-three".