404003699981 has 6 divisors (see below), whose sum is σ = 469963487790. Its totient is φ = 346288885656.

The previous prime is 404003699977. The next prime is 404003700007. The reversal of 404003699981 is 189996300404.

It can be written as a sum of positive squares in only one way, i.e., 305329184356 + 98674515625 = 552566^2 + 314125^2 .

It is not a de Polignac number, because 404003699981 - 2² = 404003699977 is a prime.

It is a super-2 number, since 2×404003699981² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404003699081) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4122486686 + ... + 4122486783.

It is an arithmetic number, because the mean of its divisors is an integer number (78327247965).

Almost surely, 2^404003699981 is an apocalyptic number.

It is an amenable number.

404003699981 is a deficient number, since it is larger than the sum of its proper divisors (65959787809).

404003699981 is an equidigital number, since it uses as much as digits as its factorization.

404003699981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8244973483 (or 8244973476 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 53.

The spelling of 404003699981 in words is "four hundred four billion, three million, six hundred ninety-nine thousand, nine hundred eighty-one".