1906077643 has 4 divisors (see below), whose sum is σ = 1988950608. Its totient is φ = 1823204680.

The previous prime is 1906077631. The next prime is 1906077647. The reversal of 1906077643 is 3467706091.

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 1906077643 - 2⁵ = 1906077611 is a prime.

It is a super-2 number, since 2×1906077643² = 7266263962288870898, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1906077643.

It is not an unprimeable number, because it can be changed into a prime (1906077647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41436448 + ... + 41436493.

It is an arithmetic number, because the mean of its divisors is an integer number (497237652).

Almost surely, 2^1906077643 is an apocalyptic number.

1906077643 is a deficient number, since it is larger than the sum of its proper divisors (82872965).

1906077643 is an equidigital number, since it uses as much as digits as its factorization.

1906077643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82872964.

The product of its (nonzero) digits is 190512, while the sum is 43.

The square root of 1906077643 is about 43658.6491201915. The cubic root of 1906077643 is about 1239.8815450061.

The spelling of 1906077643 in words is "one billion, nine hundred six million, seventy-seven thousand, six hundred forty-three".