373540621 has 2 divisors, whose sum is σ = 373540622. Its totient is φ = 373540620.

The previous prime is 373540571. The next prime is 373540667. The reversal of 373540621 is 126045373.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 276024996 + 97515625 = 16614^2 + 9875^2 .

It is a cyclic number.

It is not a de Polignac number, because 373540621 - 2¹³ = 373532429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (373541621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 186770310 + 186770311.

It is an arithmetic number, because the mean of its divisors is an integer number (186770311).

Almost surely, 2^373540621 is an apocalyptic number.

It is an amenable number.

373540621 is a deficient number, since it is larger than the sum of its proper divisors (1).

373540621 is an equidigital number, since it uses as much as digits as its factorization.

373540621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 31.

The square root of 373540621 is about 19327.1989951985. The cubic root of 373540621 is about 720.1881073580.

Adding to 373540621 its reverse (126045373), we get a palindrome (499585994).

The spelling of 373540621 in words is "three hundred seventy-three million, five hundred forty thousand, six hundred twenty-one".