1404657493 has 2 divisors, whose sum is σ = 1404657494. Its totient is φ = 1404657492.

The previous prime is 1404657481. The next prime is 1404657577. The reversal of 1404657493 is 3947564041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1041869284 + 362788209 = 32278^2 + 19047^2 .

It is an emirp because it is prime and its reverse (3947564041) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1404657493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1404657433) 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, 702328746 + 702328747.

It is an arithmetic number, because the mean of its divisors is an integer number (702328747).

Almost surely, 2^1404657493 is an apocalyptic number.

It is an amenable number.

1404657493 is a deficient number, since it is larger than the sum of its proper divisors (1).

1404657493 is an equidigital number, since it uses as much as digits as its factorization.

1404657493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 43.

The square root of 1404657493 is about 37478.7605584817. The cubic root of 1404657493 is about 1119.9281132113.

The spelling of 1404657493 in words is "one billion, four hundred four million, six hundred fifty-seven thousand, four hundred ninety-three".