1401864019 has 2 divisors, whose sum is σ = 1401864020. Its totient is φ = 1401864018.

The previous prime is 1401864001. The next prime is 1401864043. The reversal of 1401864019 is 9104681041.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1401864019 - 2¹⁷ = 1401732947 is a prime.

It is a super-2 number, since 2×1401864019² = 3930445455533664722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1401864619) 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, 700932009 + 700932010.

It is an arithmetic number, because the mean of its divisors is an integer number (700932010).

Almost surely, 2^1401864019 is an apocalyptic number.

1401864019 is a deficient number, since it is larger than the sum of its proper divisors (1).

1401864019 is an equidigital number, since it uses as much as digits as its factorization.

1401864019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 1401864019 is about 37441.4745836753. The cubic root of 1401864019 is about 1119.1852117625.

The spelling of 1401864019 in words is "one billion, four hundred one million, eight hundred sixty-four thousand, nineteen".