351487729 has 2 divisors, whose sum is σ = 351487730. Its totient is φ = 351487728.

The previous prime is 351487727. The next prime is 351487757. The reversal of 351487729 is 927784153.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 351487504 + 225 = 18748^2 + 15^2 .

It is a cyclic number.

It is not a de Polignac number, because 351487729 - 2¹ = 351487727 is a prime.

Together with 351487727, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (351487727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 175743864 + 175743865.

It is an arithmetic number, because the mean of its divisors is an integer number (175743865).

Almost surely, 2^351487729 is an apocalyptic number.

It is an amenable number.

351487729 is a deficient number, since it is larger than the sum of its proper divisors (1).

351487729 is an equidigital number, since it uses as much as digits as its factorization.

351487729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 423360, while the sum is 46.

The square root of 351487729 is about 18748.0060006391. The cubic root of 351487729 is about 705.7269827674.

The spelling of 351487729 in words is "three hundred fifty-one million, four hundred eighty-seven thousand, seven hundred twenty-nine".