350131721 has 2 divisors, whose sum is σ = 350131722. Its totient is φ = 350131720.

The previous prime is 350131709. The next prime is 350131723. The reversal of 350131721 is 127131053.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 232105225 + 118026496 = 15235^2 + 10864^2 .

It is a cyclic number.

It is not a de Polignac number, because 350131721 - 2⁶ = 350131657 is a prime.

Together with 350131723, 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 (350131723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 175065860 + 175065861.

It is an arithmetic number, because the mean of its divisors is an integer number (175065861).

Almost surely, 2^350131721 is an apocalyptic number.

It is an amenable number.

350131721 is a deficient number, since it is larger than the sum of its proper divisors (1).

350131721 is an equidigital number, since it uses as much as digits as its factorization.

350131721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 630, while the sum is 23.

The square root of 350131721 is about 18711.8069945155. The cubic root of 350131721 is about 704.8182694741.

Adding to 350131721 its reverse (127131053), we get a palindrome (477262774).

The spelling of 350131721 in words is "three hundred fifty million, one hundred thirty-one thousand, seven hundred twenty-one".