399527190987 has 32 divisors (see below), whose sum is σ = 544020228096. Its totient is φ = 260750016000.

The previous prime is 399527190977. The next prime is 399527191031. The reversal of 399527190987 is 789091725993.

It is not a de Polignac number, because 399527190987 - 2¹⁴ = 399527174603 is a prime.

It is not an unprimeable number, because it can be changed into a prime (399527190977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47383662 + ... + 47392092.

It is an arithmetic number, because the mean of its divisors is an integer number (17000632128).

Almost surely, 2^399527190987 is an apocalyptic number.

399527190987 is a deficient number, since it is larger than the sum of its proper divisors (144493037109).

399527190987 is a wasteful number, since it uses less digits than its factorization.

399527190987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10091.

The product of its (nonzero) digits is 77157360, while the sum is 69.

The spelling of 399527190987 in words is "three hundred ninety-nine billion, five hundred twenty-seven million, one hundred ninety thousand, nine hundred eighty-seven".