39187205997 has 8 divisors (see below), whose sum is σ = 52260092544. Its totient is φ = 26119561728.

The previous prime is 39187205983. The next prime is 39187205999. The reversal of 39187205997 is 79950278193.

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

It is not a de Polignac number, because 39187205997 - 2³² = 34892238701 is a prime.

It is a super-2 number, since 2×39187205997² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 39187205997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39187205999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1293093 + ... + 1323050.

It is an arithmetic number, because the mean of its divisors is an integer number (6532511568).

Almost surely, 2^39187205997 is an apocalyptic number.

It is an amenable number.

39187205997 is a deficient number, since it is larger than the sum of its proper divisors (13072886547).

39187205997 is a wasteful number, since it uses less digits than its factorization.

39187205997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2621139.

The product of its (nonzero) digits is 8573040, while the sum is 60.

The spelling of 39187205997 in words is "thirty-nine billion, one hundred eighty-seven million, two hundred five thousand, nine hundred ninety-seven".