1493663797 has 2 divisors, whose sum is σ = 1493663798. Its totient is φ = 1493663796.

The previous prime is 1493663783. The next prime is 1493663819. The reversal of 1493663797 is 7973663941.

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., 1270280881 + 223382916 = 35641^2 + 14946^2 .

It is a cyclic number.

It is not a de Polignac number, because 1493663797 - 2¹¹ = 1493661749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1493663737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 746831898 + 746831899.

It is an arithmetic number, because the mean of its divisors is an integer number (746831899).

Almost surely, 2^1493663797 is an apocalyptic number.

It is an amenable number.

1493663797 is a deficient number, since it is larger than the sum of its proper divisors (1).

1493663797 is an equidigital number, since it uses as much as digits as its factorization.

1493663797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5143824, while the sum is 55.

The square root of 1493663797 is about 38647.9468665542. The cubic root of 1493663797 is about 1143.1001584193.

The spelling of 1493663797 in words is "one billion, four hundred ninety-three million, six hundred sixty-three thousand, seven hundred ninety-seven".