4387197681 has 16 divisors (see below), whose sum is σ = 6502331520. Its totient is φ = 2923547760.

The previous prime is 4387197677. The next prime is 4387197713. The reversal of 4387197681 is 1867917834.

It is not a de Polignac number, because 4387197681 - 2² = 4387197677 is a prime.

It is a super-2 number, since 2×4387197681² = 38495006984343555522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (4387192681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31891 + ... + 98951.

It is an arithmetic number, because the mean of its divisors is an integer number (406395720).

Almost surely, 2^4387197681 is an apocalyptic number.

It is an amenable number.

4387197681 is a deficient number, since it is larger than the sum of its proper divisors (2115133839).

4387197681 is a wasteful number, since it uses less digits than its factorization.

4387197681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69493 (or 69487 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 54.

The square root of 4387197681 is about 66235.9243990752. The cubic root of 4387197681 is about 1637.0517227246.

The spelling of 4387197681 in words is "four billion, three hundred eighty-seven million, one hundred ninety-seven thousand, six hundred eighty-one".