1400256349 has 2 divisors, whose sum is σ = 1400256350. Its totient is φ = 1400256348.

The previous prime is 1400256331. The next prime is 1400256409. The reversal of 1400256349 is 9436520041.

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., 995844249 + 404412100 = 31557^2 + 20110^2 .

It is a cyclic number.

It is not a de Polignac number, because 1400256349 - 2²¹ = 1398159197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1400256049) 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, 700128174 + 700128175.

It is an arithmetic number, because the mean of its divisors is an integer number (700128175).

Almost surely, 2^1400256349 is an apocalyptic number.

It is an amenable number.

1400256349 is a deficient number, since it is larger than the sum of its proper divisors (1).

1400256349 is an equidigital number, since it uses as much as digits as its factorization.

1400256349 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 1400256349 is about 37419.9993185462. Note that the first 3 decimals coincide. The cubic root of 1400256349 is about 1118.7572176266.

The spelling of 1400256349 in words is "one billion, four hundred million, two hundred fifty-six thousand, three hundred forty-nine".