351198391 has 4 divisors (see below), whose sum is σ = 351666784. Its totient is φ = 350730000.

The previous prime is 351198377. The next prime is 351198409. The reversal of 351198391 is 193891153.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 193891153 = 1499 ⋅129347.

It is a cyclic number.

It is not a de Polignac number, because 351198391 - 2¹¹ = 351196343 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 (351198301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 233070 + ... + 234571.

It is an arithmetic number, because the mean of its divisors is an integer number (87916696).

Almost surely, 2^351198391 is an apocalyptic number.

351198391 is a deficient number, since it is larger than the sum of its proper divisors (468393).

351198391 is an equidigital number, since it uses as much as digits as its factorization.

351198391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468392.

The product of its digits is 29160, while the sum is 40.

The square root of 351198391 is about 18740.2879113422. The cubic root of 351198391 is about 705.5332826067.

The spelling of 351198391 in words is "three hundred fifty-one million, one hundred ninety-eight thousand, three hundred ninety-one".