1400321191 has 2 divisors, whose sum is σ = 1400321192. Its totient is φ = 1400321190.

The previous prime is 1400321171. The next prime is 1400321233. The reversal of 1400321191 is 1911230041.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1400321191 - 2⁵ = 1400321159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1400321171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700160595 + 700160596.

It is an arithmetic number, because the mean of its divisors is an integer number (700160596).

Almost surely, 2^1400321191 is an apocalyptic number.

1400321191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1400321191 is an equidigital number, since it uses as much as digits as its factorization.

1400321191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 1400321191 is about 37420.8657168698. The cubic root of 1400321191 is about 1118.7744862113.

The spelling of 1400321191 in words is "one billion, four hundred million, three hundred twenty-one thousand, one hundred ninety-one".