4992927781 has 4 divisors (see below), whose sum is σ = 5041402912. Its totient is φ = 4944452652.

The previous prime is 4992927769. The next prime is 4992927799. The reversal of 4992927781 is 1877292994.

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.

It is a cyclic number.

It is not a de Polignac number, because 4992927781 - 2²⁷ = 4858710053 is a prime.

It is a super-2 number, since 2×4992927781² = 49858655652563167922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4992927281) 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, 24237411 + ... + 24237616.

It is an arithmetic number, because the mean of its divisors is an integer number (1260350728).

Almost surely, 2^4992927781 is an apocalyptic number.

It is an amenable number.

4992927781 is a deficient number, since it is larger than the sum of its proper divisors (48475131).

4992927781 is a wasteful number, since it uses less digits than its factorization.

4992927781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48475130.

The product of its digits is 4572288, while the sum is 58.

The square root of 4992927781 is about 70660.6522825823. The cubic root of 4992927781 is about 1709.1693446340.

The spelling of 4992927781 in words is "four billion, nine hundred ninety-two million, nine hundred twenty-seven thousand, seven hundred eighty-one".