340756991 has 4 divisors (see below), whose sum is σ = 351749184. Its totient is φ = 329764800.

The previous prime is 340756967. The next prime is 340757017. The reversal of 340756991 is 199657043.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 199657043 = 23 ⋅8680741.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-340756991 is a prime.

It is a super-2 number, since 2×340756991² = 232230653830748162, 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 (340756961) 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, 5496050 + ... + 5496111.

It is an arithmetic number, because the mean of its divisors is an integer number (87937296).

Almost surely, 2^340756991 is an apocalyptic number.

340756991 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

340756991 is a deficient number, since it is larger than the sum of its proper divisors (10992193).

340756991 is a wasteful number, since it uses less digits than its factorization.

340756991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10992192.

The product of its (nonzero) digits is 204120, while the sum is 44.

The square root of 340756991 is about 18459.6043023679. The cubic root of 340756991 is about 698.4708053467.

The spelling of 340756991 in words is "three hundred forty million, seven hundred fifty-six thousand, nine hundred ninety-one".