1390493 has 4 divisors (see below), whose sum is σ = 1497468. Its totient is φ = 1283520.

The previous prime is 1390489. The next prime is 1390507. The reversal of 1390493 is 3940931.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 252004 + 1138489 = 502^2 + 1067^2 .

It is a cyclic number.

It is not a de Polignac number, because 1390493 - 2² = 1390489 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390483) 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 in 3 ways as a sum of consecutive naturals, for example, 53468 + ... + 53493.

It is an arithmetic number, because the mean of its divisors is an integer number (374367).

2^1390493 is an apocalyptic number.

1390493 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1390493 is a deficient number, since it is larger than the sum of its proper divisors (106975).

1390493 is a wasteful number, since it uses less digits than its factorization.

1390493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106974.

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 1390493 is about 1179.1916722908. The cubic root of 1390493 is about 111.6150956143.

The spelling of 1390493 in words is "one million, three hundred ninety thousand, four hundred ninety-three".