1634047213 has 4 divisors (see below), whose sum is σ = 1705092768. Its totient is φ = 1563001660.

The previous prime is 1634047201. The next prime is 1634047241. The reversal of 1634047213 is 3127404361.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3127404361 = 157 ⋅19919773.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1634047213 is a prime.

It is a super-2 number, since 2×1634047213² = 5340220588626134738, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1634047813) 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, 35522743 + ... + 35522788.

It is an arithmetic number, because the mean of its divisors is an integer number (426273192).

Almost surely, 2^1634047213 is an apocalyptic number.

It is an amenable number.

1634047213 is a deficient number, since it is larger than the sum of its proper divisors (71045555).

1634047213 is an equidigital number, since it uses as much as digits as its factorization.

1634047213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71045554.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 1634047213 is about 40423.3498488188. The cubic root of 1634047213 is about 1177.8451559745.

The spelling of 1634047213 in words is "one billion, six hundred thirty-four million, forty-seven thousand, two hundred thirteen".