69806421 has 16 divisors (see below), whose sum is σ = 105619200. Its totient is φ = 45546624.

The previous prime is 69806417. The next prime is 69806441. The reversal of 69806421 is 12460896.

69806421 is a `hidden beast` number, since 6 + 9 + 8 + 0 + 642 + 1 = 666.

It is not a de Polignac number, because 69806421 - 2² = 69806417 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69806441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26236 + ... + 28773.

It is an arithmetic number, because the mean of its divisors is an integer number (6601200).

Almost surely, 2^69806421 is an apocalyptic number.

It is an amenable number.

69806421 is a deficient number, since it is larger than the sum of its proper divisors (35812779).

69806421 is a wasteful number, since it uses less digits than its factorization.

69806421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55065 (or 55059 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 69806421 is about 8355.0236983506. The cubic root of 69806421 is about 411.7482772049.

The spelling of 69806421 in words is "sixty-nine million, eight hundred six thousand, four hundred twenty-one".