375281813 has 2 divisors, whose sum is σ = 375281814. Its totient is φ = 375281812.

The previous prime is 375281773. The next prime is 375281827. The reversal of 375281813 is 318182573.

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., 282004849 + 93276964 = 16793^2 + 9658^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-375281813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (375281843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 187640906 + 187640907.

It is an arithmetic number, because the mean of its divisors is an integer number (187640907).

Almost surely, 2^375281813 is an apocalyptic number.

It is an amenable number.

375281813 is a deficient number, since it is larger than the sum of its proper divisors (1).

375281813 is an equidigital number, since it uses as much as digits as its factorization.

375281813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 38.

The square root of 375281813 is about 19372.1917448698. The cubic root of 375281813 is about 721.3053820008.

The spelling of 375281813 in words is "three hundred seventy-five million, two hundred eighty-one thousand, eight hundred thirteen".