4099770721 has 4 divisors (see below), whose sum is σ = 4100676912. Its totient is φ = 4098864532.

The previous prime is 4099770709. The next prime is 4099770751. The reversal of 4099770721 is 1270779904.

4099770721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 4099770721 - 2¹⁵ = 4099737953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4099770751) 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, 446275 + ... + 455368.

It is an arithmetic number, because the mean of its divisors is an integer number (1025169228).

Almost surely, 2^4099770721 is an apocalyptic number.

It is an amenable number.

4099770721 is a deficient number, since it is larger than the sum of its proper divisors (906191).

4099770721 is an equidigital number, since it uses as much as digits as its factorization.

4099770721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 906190.

The product of its (nonzero) digits is 222264, while the sum is 46.

The square root of 4099770721 is about 64029.4519811001. The cubic root of 4099770721 is about 1600.4908287110.

The spelling of 4099770721 in words is "four billion, ninety-nine million, seven hundred seventy thousand, seven hundred twenty-one".