803689421 has 16 divisors (see below), whose sum is σ = 835225776. Its totient is φ = 772800000.

The previous prime is 803689387. The next prime is 803689459. The reversal of 803689421 is 124986308.

It can be written as a sum of positive squares in 8 ways, for example, as 145202500 + 658486921 = 12050^2 + 25661^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-803689421 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (803686421) 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, 1743131 + ... + 1743591.

It is an arithmetic number, because the mean of its divisors is an integer number (52201611).

Almost surely, 2^803689421 is an apocalyptic number.

It is an amenable number.

803689421 is a deficient number, since it is larger than the sum of its proper divisors (31536355).

803689421 is a wasteful number, since it uses less digits than its factorization.

803689421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1024.

The product of its (nonzero) digits is 82944, while the sum is 41.

The square root of 803689421 is about 28349.4165901170. The cubic root of 803689421 is about 929.7426431681.

The spelling of 803689421 in words is "eight hundred three million, six hundred eighty-nine thousand, four hundred twenty-one".