4081420997 has 4 divisors (see below), whose sum is σ = 4081644876. Its totient is φ = 4081197120.

The previous prime is 4081420969. The next prime is 4081421011. The reversal of 4081420997 is 7990241804.

4081420997 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 63886²+1.

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

It can be written as a sum of positive squares in 2 ways, for example, as 177795556 + 3903625441 = 13334^2 + 62479^2 .

It is a cyclic number.

It is not a de Polignac number, because 4081420997 - 2⁶ = 4081420933 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 (4081420957) 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, 81908 + ... + 121949.

It is an arithmetic number, because the mean of its divisors is an integer number (1020411219).

Almost surely, 2^4081420997 is an apocalyptic number.

It is an amenable number.

4081420997 is a deficient number, since it is larger than the sum of its proper divisors (223879).

4081420997 is a wasteful number, since it uses less digits than its factorization.

4081420997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223878.

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 4081420997 is about 63886.0000078264. Note that the first 5 decimals coincide. The cubic root of 4081420997 is about 1598.0994356210.

The spelling of 4081420997 in words is "four billion, eighty-one million, four hundred twenty thousand, nine hundred ninety-seven".