11501917397 has 2 divisors, whose sum is σ = 11501917398. Its totient is φ = 11501917396.

The previous prime is 11501917391. The next prime is 11501917451. The reversal of 11501917397 is 79371910511.

11501917397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11464841476 + 37075921 = 107074^2 + 6089^2 .

It is a cyclic number.

It is not a de Polignac number, because 11501917397 - 2²² = 11497723093 is a prime.

It is a super-2 number, since 2×11501917397² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11501917391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5750958698 + 5750958699.

It is an arithmetic number, because the mean of its divisors is an integer number (5750958699).

Almost surely, 2^11501917397 is an apocalyptic number.

It is an amenable number.

11501917397 is a deficient number, since it is larger than the sum of its proper divisors (1).

11501917397 is an equidigital number, since it uses as much as digits as its factorization.

11501917397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 59535, while the sum is 44.

The spelling of 11501917397 in words is "eleven billion, five hundred one million, nine hundred seventeen thousand, three hundred ninety-seven".