1403456891 has 2 divisors, whose sum is σ = 1403456892. Its totient is φ = 1403456890.

The previous prime is 1403456867. The next prime is 1403456909. The reversal of 1403456891 is 1986543041.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1403456891 is a prime.

It is not a weakly prime, because it can be changed into another prime (1403456851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 701728445 + 701728446.

It is an arithmetic number, because the mean of its divisors is an integer number (701728446).

Almost surely, 2^1403456891 is an apocalyptic number.

1403456891 is a deficient number, since it is larger than the sum of its proper divisors (1).

1403456891 is an equidigital number, since it uses as much as digits as its factorization.

1403456891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 1403456891 is about 37462.7400359344. The cubic root of 1403456891 is about 1119.6089437797.

The spelling of 1403456891 in words is "one billion, four hundred three million, four hundred fifty-six thousand, eight hundred ninety-one".