340155649 has 4 divisors (see below), whose sum is σ = 340261636. Its totient is φ = 340049664.

The previous prime is 340155631. The next prime is 340155667. The reversal of 340155649 is 946551043.

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

It is an interprime number because it is at equal distance from previous prime (340155631) and next prime (340155667).

It can be written as a sum of positive squares in 2 ways, for example, as 295840000 + 44315649 = 17200^2 + 6657^2 .

It is a cyclic number.

It is not a de Polignac number, because 340155649 - 2⁵ = 340155617 is a prime.

It is a super-2 number, since 2×340155649² = 231411731093222402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (340155619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48024 + ... + 54649.

It is an arithmetic number, because the mean of its divisors is an integer number (85065409).

Almost surely, 2^340155649 is an apocalyptic number.

It is an amenable number.

340155649 is a deficient number, since it is larger than the sum of its proper divisors (105987).

340155649 is a wasteful number, since it uses less digits than its factorization.

340155649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105986.

The product of its (nonzero) digits is 64800, while the sum is 37.

The square root of 340155649 is about 18443.3090577586. The cubic root of 340155649 is about 698.0596940488.

The spelling of 340155649 in words is "three hundred forty million, one hundred fifty-five thousand, six hundred forty-nine".