1538775373 has 2 divisors, whose sum is σ = 1538775374. Its totient is φ = 1538775372.

The previous prime is 1538775367. The next prime is 1538775397. The reversal of 1538775373 is 3735778351.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1112022409 + 426752964 = 33347^2 + 20658^2 .

It is a cyclic number.

It is not a de Polignac number, because 1538775373 - 2²⁹ = 1001904461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1538775313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 769387686 + 769387687.

It is an arithmetic number, because the mean of its divisors is an integer number (769387687).

Almost surely, 2^1538775373 is an apocalyptic number.

It is an amenable number.

1538775373 is a deficient number, since it is larger than the sum of its proper divisors (1).

1538775373 is an equidigital number, since it uses as much as digits as its factorization.

1538775373 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1852200, while the sum is 49.

The square root of 1538775373 is about 39227.2274447226. The cubic root of 1538775373 is about 1154.4941652878.

The spelling of 1538775373 in words is "one billion, five hundred thirty-eight million, seven hundred seventy-five thousand, three hundred seventy-three".