4723921894 has 4 divisors (see below), whose sum is σ = 7085882844. Its totient is φ = 2361960946.

The previous prime is 4723921889. The next prime is 4723921927. The reversal of 4723921894 is 4981293274.

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

It is a super-2 number, since 2×4723921894² = 44630876121225094472, which contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1180980472 + ... + 1180980475.

It is an arithmetic number, because the mean of its divisors is an integer number (1771470711).

Almost surely, 2^4723921894 is an apocalyptic number.

4723921894 is a deficient number, since it is larger than the sum of its proper divisors (2361960950).

4723921894 is a wasteful number, since it uses less digits than its factorization.

4723921894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2361960949.

The product of its digits is 870912, while the sum is 49.

The square root of 4723921894 is about 68730.7929097286. The cubic root of 4723921894 is about 1677.9057774605.

The spelling of 4723921894 in words is "four billion, seven hundred twenty-three million, nine hundred twenty-one thousand, eight hundred ninety-four".