1147039681 has 2 divisors, whose sum is σ = 1147039682. Its totient is φ = 1147039680.

The previous prime is 1147039643. The next prime is 1147039757. The reversal of 1147039681 is 1869307411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1119571600 + 27468081 = 33460^2 + 5241^2 .

It is an emirp because it is prime and its reverse (1869307411) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1147039681 - 2⁹ = 1147039169 is a prime.

It is a super-4 number, since 4×1147039681⁴ (a number of 37 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (1147039081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 573519840 + 573519841.

It is an arithmetic number, because the mean of its divisors is an integer number (573519841).

Almost surely, 2^1147039681 is an apocalyptic number.

It is an amenable number.

1147039681 is a deficient number, since it is larger than the sum of its proper divisors (1).

1147039681 is an equidigital number, since it uses as much as digits as its factorization.

1147039681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 1147039681 is about 33867.9742677356. The cubic root of 1147039681 is about 1046.7897965390.

The spelling of 1147039681 in words is "one billion, one hundred forty-seven million, thirty-nine thousand, six hundred eighty-one".