806978403 has 108 divisors (see below), whose sum is σ = 1550466120. Its totient is φ = 413305200.

The previous prime is 806978363. The next prime is 806978407. The reversal of 806978403 is 304879608.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is not a de Polignac number, because 806978403 - 2²⁴ = 790201187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (806978407) by changing a digit.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 11365858 + ... + 11365928.

Almost surely, 2^806978403 is an apocalyptic number.

806978403 is a deficient number, since it is larger than the sum of its proper divisors (743487717).

806978403 is a wasteful number, since it uses less digits than its factorization.

806978403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187 (or 92 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 806978403 is about 28407.3652949372. The cubic root of 806978403 is about 931.0091958313.

The spelling of 806978403 in words is "eight hundred six million, nine hundred seventy-eight thousand, four hundred three".