1493397749 has 2 divisors, whose sum is σ = 1493397750. Its totient is φ = 1493397748.

The previous prime is 1493397727. The next prime is 1493397767. The reversal of 1493397749 is 9477933941.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1415640625 + 77757124 = 37625^2 + 8818^2 .

It is a cyclic number.

It is not a de Polignac number, because 1493397749 - 2¹² = 1493393653 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1493397694 and 1493397703.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1493397769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 746698874 + 746698875.

It is an arithmetic number, because the mean of its divisors is an integer number (746698875).

Almost surely, 2^1493397749 is an apocalyptic number.

It is an amenable number.

1493397749 is a deficient number, since it is larger than the sum of its proper divisors (1).

1493397749 is an equidigital number, since it uses as much as digits as its factorization.

1493397749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5143824, while the sum is 56.

The square root of 1493397749 is about 38644.5047710538. The cubic root of 1493397749 is about 1143.0322855888.

The spelling of 1493397749 in words is "one billion, four hundred ninety-three million, three hundred ninety-seven thousand, seven hundred forty-nine".