1493731 has 2 divisors, whose sum is σ = 1493732. Its totient is φ = 1493730.

The previous prime is 1493729. The next prime is 1493741. The reversal of 1493731 is 1373941.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1493731 - 2¹ = 1493729 is a prime.

It is a super-2 number, since 2×1493731² = 4462464600722, which contains 22 as substring.

Together with 1493729, it forms a pair of twin primes.

1493731 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1493731.

It is not a weakly prime, because it can be changed into another prime (1493741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 746865 + 746866.

It is an arithmetic number, because the mean of its divisors is an integer number (746866).

2^1493731 is an apocalyptic number.

1493731 is a deficient number, since it is larger than the sum of its proper divisors (1).

1493731 is an equidigital number, since it uses as much as digits as its factorization.

1493731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2268, while the sum is 28.

The square root of 1493731 is about 1222.1828832053. The cubic root of 1493731 is about 114.3117301636.

The spelling of 1493731 in words is "one million, four hundred ninety-three thousand, seven hundred thirty-one".