993476054947 has 4 divisors (see below), whose sum is σ = 993478089520. Its totient is φ = 993474020376.

The previous prime is 993476054939. The next prime is 993476054959. The reversal of 993476054947 is 749450674399.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 749450674399 = 7 ⋅107064382057.

It is a 3-Lehmer number, since φ(993476054947) divides (993476054947-1)³.

It is a cyclic number.

It is not a de Polignac number, because 993476054947 - 2³ = 993476054939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (993476054047) 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, 203458 + ... + 1424200.

It is an arithmetic number, because the mean of its divisors is an integer number (248369522380).

Almost surely, 2^993476054947 is an apocalyptic number.

993476054947 is the 813829-th pentagonal number.

993476054947 is a deficient number, since it is larger than the sum of its proper divisors (2034573).

993476054947 is a wasteful number, since it uses less digits than its factorization.

993476054947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2034572.

The product of its (nonzero) digits is 205752960, while the sum is 67.

The spelling of 993476054947 in words is "nine hundred ninety-three billion, four hundred seventy-six million, fifty-four thousand, nine hundred forty-seven".