7981001897 has 16 divisors (see below), whose sum is σ = 8902662912. Its totient is φ = 7092405120.

The previous prime is 7981001887. The next prime is 7981001923.

7981001897 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 7981001897 - 2⁴ = 7981001881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7981001827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 434063 + ... + 452075.

It is an arithmetic number, because the mean of its divisors is an integer number (556416432).

Almost surely, 2^7981001897 is an apocalyptic number.

It is an amenable number.

7981001897 is a deficient number, since it is larger than the sum of its proper divisors (921661015).

7981001897 is a wasteful number, since it uses less digits than its factorization.

7981001897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18928.

The product of its (nonzero) digits is 254016, while the sum is 50.

The square root of 7981001897 is about 89336.4533491228. The cubic root of 7981001897 is about 1998.4155698721.

It can be divided in two parts, 798100 and 1897, that added together give a palindrome (799997).

The spelling of 7981001897 in words is "seven billion, nine hundred eighty-one million, one thousand, eight hundred ninety-seven".