1493431306 has 4 divisors (see below), whose sum is σ = 2240146962. Its totient is φ = 746715652.

The previous prime is 1493431271. The next prime is 1493431307. The reversal of 1493431306 is 6031343941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6031343941 = 7 ⋅861620563.

It can be written as a sum of positive squares in only one way, i.e., 1108290681 + 385140625 = 33291^2 + 19625^2 .

It is not an unprimeable number, because it can be changed into a prime (1493431307) 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, 373357825 + ... + 373357828.

Almost surely, 2^1493431306 is an apocalyptic number.

1493431306 is a deficient number, since it is larger than the sum of its proper divisors (746715656).

1493431306 is an equidigital number, since it uses as much as digits as its factorization.

1493431306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 746715655.

The product of its (nonzero) digits is 23328, while the sum is 34.

The square root of 1493431306 is about 38644.9389441878. The cubic root of 1493431306 is about 1143.0408469265.

The spelling of 1493431306 in words is "one billion, four hundred ninety-three million, four hundred thirty-one thousand, three hundred six".