373923409 has 2 divisors, whose sum is σ = 373923410. Its totient is φ = 373923408.

The previous prime is 373923379. The next prime is 373923413. The reversal of 373923409 is 904329373.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 306355009 + 67568400 = 17503^2 + 8220^2 .

It is an emirp because it is prime and its reverse (904329373) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 373923409 - 2¹⁷ = 373792337 is a prime.

It is not a weakly prime, because it can be changed into another prime (373923469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 186961704 + 186961705.

It is an arithmetic number, because the mean of its divisors is an integer number (186961705).

Almost surely, 2^373923409 is an apocalyptic number.

It is an amenable number.

373923409 is a deficient number, since it is larger than the sum of its proper divisors (1).

373923409 is an equidigital number, since it uses as much as digits as its factorization.

373923409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 122472, while the sum is 40.

The square root of 373923409 is about 19337.0992912588. The cubic root of 373923409 is about 720.4340290733.

The spelling of 373923409 in words is "three hundred seventy-three million, nine hundred twenty-three thousand, four hundred nine".