1401193643 has 2 divisors, whose sum is σ = 1401193644. Its totient is φ = 1401193642.

The previous prime is 1401193621. The next prime is 1401193679. The reversal of 1401193643 is 3463911041.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1401193643 - 2¹² = 1401189547 is a prime.

It is a super-2 number, since 2×1401193643² = 3926687250367222898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1401193693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700596821 + 700596822.

It is an arithmetic number, because the mean of its divisors is an integer number (700596822).

Almost surely, 2^1401193643 is an apocalyptic number.

1401193643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1401193643 is an equidigital number, since it uses as much as digits as its factorization.

1401193643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 1401193643 is about 37432.5211948113. The cubic root of 1401193643 is about 1119.0067839640.

The spelling of 1401193643 in words is "one billion, four hundred one million, one hundred ninety-three thousand, six hundred forty-three".