11397845731 has 2 divisors, whose sum is σ = 11397845732. Its totient is φ = 11397845730.

The previous prime is 11397845689. The next prime is 11397845747. The reversal of 11397845731 is 13754879311.

It is a strong prime.

It is an emirp because it is prime and its reverse (13754879311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11397845731 - 2⁹ = 11397845219 is a prime.

It is a super-2 number, since 2×11397845731² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11397845131) 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 as a sum of consecutive naturals, namely, 5698922865 + 5698922866.

It is an arithmetic number, because the mean of its divisors is an integer number (5698922866).

Almost surely, 2^11397845731 is an apocalyptic number.

11397845731 is a deficient number, since it is larger than the sum of its proper divisors (1).

11397845731 is an equidigital number, since it uses as much as digits as its factorization.

11397845731 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 11397845731 in words is "eleven billion, three hundred ninety-seven million, eight hundred forty-five thousand, seven hundred thirty-one".