351427391 has 4 divisors (see below), whose sum is σ = 401631312. Its totient is φ = 301223472.

The previous prime is 351427381. The next prime is 351427393. The reversal of 351427391 is 193724153.

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

It is a cyclic number.

It is not a de Polignac number, because 351427391 - 2¹⁰ = 351426367 is a prime.

It is a super-2 number, since 2×351427391² = 247002422290133762, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (351427393) 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, 25101950 + ... + 25101963.

It is an arithmetic number, because the mean of its divisors is an integer number (100407828).

Almost surely, 2^351427391 is an apocalyptic number.

351427391 is a deficient number, since it is larger than the sum of its proper divisors (50203921).

351427391 is an equidigital number, since it uses as much as digits as its factorization.

351427391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50203920.

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

The square root of 351427391 is about 18746.3967471085. The cubic root of 351427391 is about 705.6865976766.

The spelling of 351427391 in words is "three hundred fifty-one million, four hundred twenty-seven thousand, three hundred ninety-one".