373721 has 2 divisors, whose sum is σ = 373722. Its totient is φ = 373720.

The previous prime is 373717. The next prime is 373753. The reversal of 373721 is 127373.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 373321 + 400 = 611^2 + 20^2 .

It is an emirp because it is prime and its reverse (127373) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 373721 - 2² = 373717 is a prime.

It is not a weakly prime, because it can be changed into another prime (373621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 186860 + 186861.

It is an arithmetic number, because the mean of its divisors is an integer number (186861).

2³⁷³⁷²¹ is an apocalyptic number.

It is an amenable number.

373721 is a deficient number, since it is larger than the sum of its proper divisors (1).

373721 is an equidigital number, since it uses as much as digits as its factorization.

373721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 882, while the sum is 23.

The square root of 373721 is about 611.3272446080. The cubic root of 373721 is about 72.0304012562.

It can be divided in two parts, 37372 and 1, that added together give a palindrome (37373).

The spelling of 373721 in words is "three hundred seventy-three thousand, seven hundred twenty-one", and thus it is an iban number.