3973994263 has 4 divisors (see below), whose sum is σ = 3978357408. Its totient is φ = 3969631120.

The previous prime is 3973994203. The next prime is 3973994309. The reversal of 3973994263 is 3624993793.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3973994263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3973994203) 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, 2180206 + ... + 2182027.

It is an arithmetic number, because the mean of its divisors is an integer number (994589352).

Almost surely, 2^3973994263 is an apocalyptic number.

3973994263 is a deficient number, since it is larger than the sum of its proper divisors (4363145).

3973994263 is an equidigital number, since it uses as much as digits as its factorization.

3973994263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4363144.

The product of its digits is 6613488, while the sum is 55.

The square root of 3973994263 is about 63039.6245467880. The cubic root of 3973994263 is about 1583.9534418123.

The spelling of 3973994263 in words is "three billion, nine hundred seventy-three million, nine hundred ninety-four thousand, two hundred sixty-three".