1403640253 has 2 divisors, whose sum is σ = 1403640254. Its totient is φ = 1403640252.

The previous prime is 1403640239. The next prime is 1403640263. The reversal of 1403640253 is 3520463041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1391439204 + 12201049 = 37302^2 + 3493^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1403640253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1403640263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 701820126 + 701820127.

It is an arithmetic number, because the mean of its divisors is an integer number (701820127).

Almost surely, 2^1403640253 is an apocalyptic number.

It is an amenable number.

1403640253 is a deficient number, since it is larger than the sum of its proper divisors (1).

1403640253 is an equidigital number, since it uses as much as digits as its factorization.

1403640253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 1403640253 is about 37465.1872142660. The cubic root of 1403640253 is about 1119.6577007209.

It can be divided in two parts, 14036 and 40253, that added together give a square (54289 = 233²).

The spelling of 1403640253 in words is "one billion, four hundred three million, six hundred forty thousand, two hundred fifty-three".