1081008399 has 8 divisors (see below), whose sum is σ = 1441526832. Its totient is φ = 720581120.

The previous prime is 1081008373. The next prime is 1081008403. The reversal of 1081008399 is 9938001801.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1081008399 - 2¹⁵ = 1080975631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1081008199) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12847 + ... + 48239.

It is an arithmetic number, because the mean of its divisors is an integer number (180190854).

Almost surely, 2^1081008399 is an apocalyptic number.

1081008399 is a deficient number, since it is larger than the sum of its proper divisors (360518433).

1081008399 is a wasteful number, since it uses less digits than its factorization.

1081008399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45577.

The product of its (nonzero) digits is 15552, while the sum is 39.

The square root of 1081008399 is about 32878.6921728952. The cubic root of 1081008399 is about 1026.3047905319.

The spelling of 1081008399 in words is "one billion, eighty-one million, eight thousand, three hundred ninety-nine".