340737491 has 4 divisors (see below), whose sum is σ = 341571000. Its totient is φ = 339903984.

The previous prime is 340737487. The next prime is 340737497. The reversal of 340737491 is 194737043.

It is a happy number.

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 340737491 - 2² = 340737487 is a prime.

It is a super-2 number, since 2×340737491² = 232204075545950162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (340737497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 416141 + ... + 416958.

It is an arithmetic number, because the mean of its divisors is an integer number (85392750).

Almost surely, 2^340737491 is an apocalyptic number.

340737491 is a deficient number, since it is larger than the sum of its proper divisors (833509).

340737491 is an equidigital number, since it uses as much as digits as its factorization.

340737491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 833508.

The product of its (nonzero) digits is 63504, while the sum is 38.

The square root of 340737491 is about 18459.0761144755. The cubic root of 340737491 is about 698.4574816382.

The spelling of 340737491 in words is "three hundred forty million, seven hundred thirty-seven thousand, four hundred ninety-one".