4001388120349 has 2 divisors, whose sum is σ = 4001388120350. Its totient is φ = 4001388120348.

The previous prime is 4001388120341. The next prime is 4001388120437. The reversal of 4001388120349 is 9430218831004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2862803088324 + 1138585032025 = 1691982^2 + 1067045^2 .

It is a cyclic number.

It is not a de Polignac number, because 4001388120349 - 2³ = 4001388120341 is a prime.

It is a super-2 number, since 2×4001388120349² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4001388120341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2000694060174 + 2000694060175.

It is an arithmetic number, because the mean of its divisors is an integer number (2000694060175).

Almost surely, 2^{4001388120349} is an apocalyptic number.

It is an amenable number.

4001388120349 is a deficient number, since it is larger than the sum of its proper divisors (1).

4001388120349 is an equidigital number, since it uses as much as digits as its factorization.

4001388120349 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 165888, while the sum is 43.

The spelling of 4001388120349 in words is "four trillion, one billion, three hundred eighty-eight million, one hundred twenty thousand, three hundred forty-nine".