1493409901 has 2 divisors, whose sum is σ = 1493409902. Its totient is φ = 1493409900.

The previous prime is 1493409893. The next prime is 1493409977. The reversal of 1493409901 is 1099043941.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1236577225 + 256832676 = 35165^2 + 16026^2 .

It is a cyclic number.

It is not a de Polignac number, because 1493409901 - 2³ = 1493409893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1493407901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 746704950 + 746704951.

It is an arithmetic number, because the mean of its divisors is an integer number (746704951).

Almost surely, 2^1493409901 is an apocalyptic number.

It is an amenable number.

1493409901 is a deficient number, since it is larger than the sum of its proper divisors (1).

1493409901 is an equidigital number, since it uses as much as digits as its factorization.

1493409901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 40.

The square root of 1493409901 is about 38644.6619987806. The cubic root of 1493409901 is about 1143.0353859218.

The spelling of 1493409901 in words is "one billion, four hundred ninety-three million, four hundred nine thousand, nine hundred one".