391925208004201 has 3 divisors (see below), whose sum is σ = 391925227801303. Its totient is φ = 391925188207100.

The previous prime is 391925208004171. The next prime is 391925208004229. The reversal of 391925208004201 is 102400802529193.

The square root of 391925208004201 is 19797101.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 129779965194201 + 262145242810000 = 11392101^2 + 16190900^2 .

It is not a de Polignac number, because 391925208004201 - 2¹³ = 391925207996009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (391925208004261) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 9898551 + ... + 29695651.

Almost surely, 2^{391925208004201} is an apocalyptic number.

391925208004201 is the 19797101-st square number.

391925208004201 is the 9898551-st centered octagonal number.

It is an amenable number.

391925208004201 is a deficient number, since it is larger than the sum of its proper divisors (19797102).

391925208004201 is an frugal number, since it uses more digits than its factorization.

391925208004201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39594202 (or 19797101 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 46.

The spelling of 391925208004201 in words is "three hundred ninety-one trillion, nine hundred twenty-five billion, two hundred eight million, four thousand, two hundred one".