1390271293 has 4 divisors (see below), whose sum is σ = 1390353340. Its totient is φ = 1390189248.

The previous prime is 1390271273. The next prime is 1390271299. The reversal of 1390271293 is 3921720931.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1146973689 + 243297604 = 33867^2 + 15598^2 .

It is a cyclic number.

It is not a de Polignac number, because 1390271293 - 2¹³ = 1390263101 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 (1390271299) 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, 5148 + ... + 52981.

It is an arithmetic number, because the mean of its divisors is an integer number (347588335).

Almost surely, 2^1390271293 is an apocalyptic number.

It is an amenable number.

1390271293 is a deficient number, since it is larger than the sum of its proper divisors (82047).

1390271293 is an equidigital number, since it uses as much as digits as its factorization.

1390271293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82046.

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 1390271293 is about 37286.3419096055. The cubic root of 1390271293 is about 1116.0916314689.

The spelling of 1390271293 in words is "one billion, three hundred ninety million, two hundred seventy-one thousand, two hundred ninety-three".