399209526087 has 32 divisors (see below), whose sum is σ = 547882030080. Its totient is φ = 258371107200.

The previous prime is 399209526061. The next prime is 399209526101. The reversal of 399209526087 is 780625902993.

It is not a de Polignac number, because 399209526087 - 2⁸ = 399209525831 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 399209526087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399209536087) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 169802962 + ... + 169805312.

It is an arithmetic number, because the mean of its divisors is an integer number (17121313440).

Almost surely, 2^399209526087 is an apocalyptic number.

399209526087 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

399209526087 is a deficient number, since it is larger than the sum of its proper divisors (148672503993).

399209526087 is a wasteful number, since it uses less digits than its factorization.

399209526087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5143.

The product of its (nonzero) digits is 14696640, while the sum is 60.

The spelling of 399209526087 in words is "three hundred ninety-nine billion, two hundred nine million, five hundred twenty-six thousand, eighty-seven".