399487529005 has 16 divisors (see below), whose sum is σ = 482967249840. Its totient is φ = 317202683392.

The previous prime is 399487528981. The next prime is 399487529009. The reversal of 399487529005 is 500925784993.

It can be written as a sum of positive squares in 8 ways, for example, as 63868914729 + 335618614276 = 252723^2 + 579326^2 .

It is a cyclic number.

It is not a de Polignac number, because 399487529005 - 2²¹ = 399485431853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399487529009) 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, 4197891 + ... + 4291999.

It is an arithmetic number, because the mean of its divisors is an integer number (30185453115).

Almost surely, 2^399487529005 is an apocalyptic number.

It is an amenable number.

399487529005 is a deficient number, since it is larger than the sum of its proper divisors (83479720835).

399487529005 is a wasteful number, since it uses less digits than its factorization.

399487529005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100448.

The product of its (nonzero) digits is 24494400, while the sum is 61.

The spelling of 399487529005 in words is "three hundred ninety-nine billion, four hundred eighty-seven million, five hundred twenty-nine thousand, five".