1390690753 has 4 divisors (see below), whose sum is σ = 1391397588. Its totient is φ = 1389983920.

The previous prime is 1390690733. The next prime is 1390690789. The reversal of 1390690753 is 3570960931.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3570960931 = 563 ⋅6342737.

It can be written as a sum of positive squares in 2 ways, for example, as 636199729 + 754491024 = 25223^2 + 27468^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1390690753 is a prime.

It is a super-3 number, since 3×1390690753³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1390690723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 350458 + ... + 354403.

It is an arithmetic number, because the mean of its divisors is an integer number (347849397).

Almost surely, 2^1390690753 is an apocalyptic number.

It is an amenable number.

1390690753 is a deficient number, since it is larger than the sum of its proper divisors (706835).

1390690753 is an equidigital number, since it uses as much as digits as its factorization.

1390690753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706834.

The product of its (nonzero) digits is 153090, while the sum is 43.

The square root of 1390690753 is about 37291.9663332466. The cubic root of 1390690753 is about 1116.2038658516.

The spelling of 1390690753 in words is "one billion, three hundred ninety million, six hundred ninety thousand, seven hundred fifty-three".