2153835947 has 4 divisors (see below), whose sum is σ = 2154028800. Its totient is φ = 2153643096.

The previous prime is 2153835941. The next prime is 2153835979. The reversal of 2153835947 is 7495383512.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2153835947 - 2¹² = 2153831851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2153835941) 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, 78572 + ... + 102377.

It is an arithmetic number, because the mean of its divisors is an integer number (538507200).

Almost surely, 2^2153835947 is an apocalyptic number.

2153835947 is a deficient number, since it is larger than the sum of its proper divisors (192853).

2153835947 is a wasteful number, since it uses less digits than its factorization.

2153835947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192852.

The product of its digits is 907200, while the sum is 47.

The square root of 2153835947 is about 46409.4381241575. The cubic root of 2153835947 is about 1291.4300082570.

The spelling of 2153835947 in words is "two billion, one hundred fifty-three million, eight hundred thirty-five thousand, nine hundred forty-seven".