373991897 has 2 divisors, whose sum is σ = 373991898. Its totient is φ = 373991896.

The previous prime is 373991887. The next prime is 373991899. The reversal of 373991897 is 798199373.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 321269776 + 52722121 = 17924^2 + 7261^2 .

It is a cyclic number.

It is not a de Polignac number, because 373991897 - 2⁴ = 373991881 is a prime.

Together with 373991899, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (373991899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 186995948 + 186995949.

It is an arithmetic number, because the mean of its divisors is an integer number (186995949).

Almost surely, 2^373991897 is an apocalyptic number.

It is an amenable number.

373991897 is a deficient number, since it is larger than the sum of its proper divisors (1).

373991897 is an equidigital number, since it uses as much as digits as its factorization.

373991897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2571912, while the sum is 56.

The square root of 373991897 is about 19338.8701066014. The cubic root of 373991897 is about 720.4780114080.

The spelling of 373991897 in words is "three hundred seventy-three million, nine hundred ninety-one thousand, eight hundred ninety-seven".