1493908789 has 2 divisors, whose sum is σ = 1493908790. Its totient is φ = 1493908788.

The previous prime is 1493908729. The next prime is 1493908883. The reversal of 1493908789 is 9878093941.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1167383889 + 326524900 = 34167^2 + 18070^2 .

It is a cyclic number.

It is not a de Polignac number, because 1493908789 - 2⁹ = 1493908277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1493908729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 746954394 + 746954395.

It is an arithmetic number, because the mean of its divisors is an integer number (746954395).

Almost surely, 2^1493908789 is an apocalyptic number.

It is an amenable number.

1493908789 is a deficient number, since it is larger than the sum of its proper divisors (1).

1493908789 is an equidigital number, since it uses as much as digits as its factorization.

1493908789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3919104, while the sum is 58.

The square root of 1493908789 is about 38651.1162710729. The cubic root of 1493908789 is about 1143.1626524211.

The spelling of 1493908789 in words is "one billion, four hundred ninety-three million, nine hundred eight thousand, seven hundred eighty-nine".