1390693 has 2 divisors, whose sum is σ = 1390694. Its totient is φ = 1390692.

The previous prime is 1390681. The next prime is 1390699. The reversal of 1390693 is 3960931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1340964 + 49729 = 1158^2 + 223^2 .

It is a cyclic number.

It is not a de Polignac number, because 1390693 - 2¹³ = 1382501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1390699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 695346 + 695347.

It is an arithmetic number, because the mean of its divisors is an integer number (695347).

2^1390693 is an apocalyptic number.

It is an amenable number.

1390693 is a deficient number, since it is larger than the sum of its proper divisors (1).

1390693 is an equidigital number, since it uses as much as digits as its factorization.

1390693 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4374, while the sum is 31.

The square root of 1390693 is about 1179.2764730970. The cubic root of 1390693 is about 111.6204467018.

The spelling of 1390693 in words is "one million, three hundred ninety thousand, six hundred ninety-three".