1940654767 has 4 divisors (see below), whose sum is σ = 1940906440. Its totient is φ = 1940403096.

The previous prime is 1940654761. The next prime is 1940654791. The reversal of 1940654767 is 7674560491.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7674560491 = 13 ⋅590350807.

It is a cyclic number.

It is not a de Polignac number, because 1940654767 - 2²³ = 1932266159 is a prime.

It is a super-2 number, since 2×1940654767² = 7532281849359648578, 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 1940654767.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1940654761) 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, 113892 + ... + 129817.

It is an arithmetic number, because the mean of its divisors is an integer number (485226610).

Almost surely, 2^1940654767 is an apocalyptic number.

1940654767 is a deficient number, since it is larger than the sum of its proper divisors (251673).

1940654767 is an equidigital number, since it uses as much as digits as its factorization.

1940654767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251672.

The product of its (nonzero) digits is 1270080, while the sum is 49.

The square root of 1940654767 is about 44052.8633235117. The cubic root of 1940654767 is about 1247.3340016312.

The spelling of 1940654767 in words is "one billion, nine hundred forty million, six hundred fifty-four thousand, seven hundred sixty-seven".