351111389 has 4 divisors (see below), whose sum is σ = 360600924. Its totient is φ = 341621856.

The previous prime is 351111377. The next prime is 351111403. The reversal of 351111389 is 983111153.

It is a happy number.

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 180364900 + 170746489 = 13430^2 + 13067^2 .

It is a cyclic number.

It is not a de Polignac number, because 351111389 - 2¹² = 351107293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (351111349) 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, 4744712 + ... + 4744785.

It is an arithmetic number, because the mean of its divisors is an integer number (90150231).

Almost surely, 2^351111389 is an apocalyptic number.

It is an amenable number.

351111389 is a deficient number, since it is larger than the sum of its proper divisors (9489535).

351111389 is an equidigital number, since it uses as much as digits as its factorization.

351111389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9489534.

The product of its digits is 3240, while the sum is 32.

The square root of 351111389 is about 18737.9665118710. The cubic root of 351111389 is about 705.4750174611.

The spelling of 351111389 in words is "three hundred fifty-one million, one hundred eleven thousand, three hundred eighty-nine".