373400021 has 2 divisors, whose sum is σ = 373400022. Its totient is φ = 373400020.

The previous prime is 373400017. The next prime is 373400033. The reversal of 373400021 is 120004373.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 325983025 + 47416996 = 18055^2 + 6886^2 .

It is a cyclic number.

It is not a de Polignac number, because 373400021 - 2² = 373400017 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 373399966 and 373400002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (373400011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 186700010 + 186700011.

It is an arithmetic number, because the mean of its divisors is an integer number (186700011).

Almost surely, 2^373400021 is an apocalyptic number.

It is an amenable number.

373400021 is a deficient number, since it is larger than the sum of its proper divisors (1).

373400021 is an equidigital number, since it uses as much as digits as its factorization.

373400021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 373400021 is about 19323.5612918530. The cubic root of 373400021 is about 720.0977368606.

Adding to 373400021 its reverse (120004373), we get a palindrome (493404394).

The spelling of 373400021 in words is "three hundred seventy-three million, four hundred thousand, twenty-one".