351220769 has 4 divisors (see below), whose sum is σ = 363331860. Its totient is φ = 339109680.

The previous prime is 351220729. The next prime is 351220783. The reversal of 351220769 is 967022153.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 137710225 + 213510544 = 11735^2 + 14612^2 .

It is a cyclic number.

It is not a de Polignac number, because 351220769 - 2¹² = 351216673 is a prime.

It is a super-2 number, since 2×351220769² = 246712057153902722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (351220729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6055502 + ... + 6055559.

It is an arithmetic number, because the mean of its divisors is an integer number (90832965).

Almost surely, 2^351220769 is an apocalyptic number.

It is an amenable number.

351220769 is a deficient number, since it is larger than the sum of its proper divisors (12111091).

351220769 is a wasteful number, since it uses less digits than its factorization.

351220769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12111090.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 351220769 is about 18740.8849577601. The cubic root of 351220769 is about 705.5482675733.

The spelling of 351220769 in words is "three hundred fifty-one million, two hundred twenty thousand, seven hundred sixty-nine".