340661831 has 4 divisors (see below), whose sum is σ = 341736792. Its totient is φ = 339586872.

The previous prime is 340661819. The next prime is 340661837. The reversal of 340661831 is 138166043.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 138166043 = 19 ⋅7271897.

It is a cyclic number.

It is not a de Polignac number, because 340661831 - 2¹⁴ = 340645447 is a prime.

It is a super-2 number, since 2×340661831² = 232100966200545122, 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 (340661837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 537005 + ... + 537638.

It is an arithmetic number, because the mean of its divisors is an integer number (85434198).

Almost surely, 2^340661831 is an apocalyptic number.

340661831 is a deficient number, since it is larger than the sum of its proper divisors (1074961).

340661831 is a wasteful number, since it uses less digits than its factorization.

340661831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1074960.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 340661831 is about 18457.0266023539. The cubic root of 340661831 is about 698.4057808359.

The spelling of 340661831 in words is "three hundred forty million, six hundred sixty-one thousand, eight hundred thirty-one".