1402640293 has 2 divisors, whose sum is σ = 1402640294. Its totient is φ = 1402640292.

The previous prime is 1402640221. The next prime is 1402640321. The reversal of 1402640293 is 3920462041.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1361462404 + 41177889 = 36898^2 + 6417^2 .

It is an emirp because it is prime and its reverse (3920462041) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1402640293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1402640203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 701320146 + 701320147.

It is an arithmetic number, because the mean of its divisors is an integer number (701320147).

Almost surely, 2^1402640293 is an apocalyptic number.

It is an amenable number.

1402640293 is a deficient number, since it is larger than the sum of its proper divisors (1).

1402640293 is an equidigital number, since it uses as much as digits as its factorization.

1402640293 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 1402640293 is about 37451.8396477396. The cubic root of 1402640293 is about 1119.3917543979.

The spelling of 1402640293 in words is "one billion, four hundred two million, six hundred forty thousand, two hundred ninety-three".