7235917681 has 2 divisors, whose sum is σ = 7235917682. Its totient is φ = 7235917680.

The previous prime is 7235917627. The next prime is 7235917769. The reversal of 7235917681 is 1867195327.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4874832400 + 2361085281 = 69820^2 + 48591^2 .

It is an emirp because it is prime and its reverse (1867195327) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7235917681 - 2²⁵ = 7202363249 is a prime.

It is a super-2 number, since 2×7235917681² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7235917181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3617958840 + 3617958841.

It is an arithmetic number, because the mean of its divisors is an integer number (3617958841).

Almost surely, 2^7235917681 is an apocalyptic number.

It is an amenable number.

7235917681 is a deficient number, since it is larger than the sum of its proper divisors (1).

7235917681 is an equidigital number, since it uses as much as digits as its factorization.

7235917681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 635040, while the sum is 49.

The square root of 7235917681 is about 85064.1974099562. The cubic root of 7235917681 is about 1934.1843834955.

The spelling of 7235917681 in words is "seven billion, two hundred thirty-five million, nine hundred seventeen thousand, six hundred eighty-one".