375120821 has 2 divisors, whose sum is σ = 375120822. Its totient is φ = 375120820.

The previous prime is 375120799. The next prime is 375120833. The reversal of 375120821 is 128021573.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 320803921 + 54316900 = 17911^2 + 7370^2 .

It is a cyclic number.

It is not a de Polignac number, because 375120821 - 2¹⁸ = 374858677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (375120841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 187560410 + 187560411.

It is an arithmetic number, because the mean of its divisors is an integer number (187560411).

Almost surely, 2^375120821 is an apocalyptic number.

It is an amenable number.

375120821 is a deficient number, since it is larger than the sum of its proper divisors (1).

375120821 is an equidigital number, since it uses as much as digits as its factorization.

375120821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 375120821 is about 19368.0360646091. The cubic root of 375120821 is about 721.2022230757.

The spelling of 375120821 in words is "three hundred seventy-five million, one hundred twenty thousand, eight hundred twenty-one".