201634928947 has 4 divisors (see below), whose sum is σ = 202590544936. Its totient is φ = 200679312960.

The previous prime is 201634928909. The next prime is 201634928959. The reversal of 201634928947 is 749829436102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 749829436102 = 2 ⋅374914718051.

It is a cyclic number.

It is not a de Polignac number, because 201634928947 - 2⁷ = 201634928819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201634928347) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 477807678 + ... + 477808099.

It is an arithmetic number, because the mean of its divisors is an integer number (50647636234).

Almost surely, 2^201634928947 is an apocalyptic number.

201634928947 is a deficient number, since it is larger than the sum of its proper divisors (955615989).

201634928947 is an equidigital number, since it uses as much as digits as its factorization.

201634928947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 955615988.

The product of its (nonzero) digits is 5225472, while the sum is 55.

The spelling of 201634928947 in words is "two hundred one billion, six hundred thirty-four million, nine hundred twenty-eight thousand, nine hundred forty-seven".