343891157 has 4 divisors (see below), whose sum is σ = 343932576. Its totient is φ = 343849740.

The previous prime is 343891139. The next prime is 343891159. The reversal of 343891157 is 751198343.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 343891157 - 2⁸ = 343890901 is a prime.

It is a super-2 number, since 2×343891157² = 236522255725597298, 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 (343891159) 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, 3473 + ... + 26454.

It is an arithmetic number, because the mean of its divisors is an integer number (85983144).

Almost surely, 2^343891157 is an apocalyptic number.

It is an amenable number.

343891157 is a deficient number, since it is larger than the sum of its proper divisors (41419).

343891157 is a wasteful number, since it uses less digits than its factorization.

343891157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41418.

The product of its digits is 90720, while the sum is 41.

The square root of 343891157 is about 18544.3025482222. The cubic root of 343891157 is about 700.6057049883.

The spelling of 343891157 in words is "three hundred forty-three million, eight hundred ninety-one thousand, one hundred fifty-seven".