1406921497 has 2 divisors, whose sum is σ = 1406921498. Its totient is φ = 1406921496.

The previous prime is 1406921449. The next prime is 1406921521. The reversal of 1406921497 is 7941296041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1406175001 + 746496 = 37499^2 + 864^2 .

It is a cyclic number.

It is not a de Polignac number, because 1406921497 - 2¹⁵ = 1406888729 is a prime.

It is not a weakly prime, because it can be changed into another prime (1406921407) 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, 703460748 + 703460749.

It is an arithmetic number, because the mean of its divisors is an integer number (703460749).

Almost surely, 2^1406921497 is an apocalyptic number.

It is an amenable number.

1406921497 is a deficient number, since it is larger than the sum of its proper divisors (1).

1406921497 is an equidigital number, since it uses as much as digits as its factorization.

1406921497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 1406921497 is about 37508.9522247690. The cubic root of 1406921497 is about 1120.5294841794.

The spelling of 1406921497 in words is "one billion, four hundred six million, nine hundred twenty-one thousand, four hundred ninety-seven".