403424661 has 16 divisors (see below), whose sum is σ = 542665728. Its totient is φ = 266577600.

The previous prime is 403424657. The next prime is 403424683. The reversal of 403424661 is 166424304.

It is not a de Polignac number, because 403424661 - 2² = 403424657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (403422661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 180531 + ... + 182751.

It is an arithmetic number, because the mean of its divisors is an integer number (33916608).

Almost surely, 2^403424661 is an apocalyptic number.

It is an amenable number.

403424661 is a deficient number, since it is larger than the sum of its proper divisors (139241067).

403424661 is a wasteful number, since it uses less digits than its factorization.

403424661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2732.

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 403424661 is about 20085.4340505751. The cubic root of 403424661 is about 738.9030869096.

Adding to 403424661 its reverse (166424304), we get a palindrome (569848965).

The spelling of 403424661 in words is "four hundred three million, four hundred twenty-four thousand, six hundred sixty-one".