1927676645 has 4 divisors (see below), whose sum is σ = 2313211980. Its totient is φ = 1542141312.

The previous prime is 1927676633. The next prime is 1927676693. The reversal of 1927676645 is 5466767291.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5466767291 = 557 ⋅9814663.

It can be written as a sum of positive squares in 2 ways, for example, as 971506561 + 956170084 = 31169^2 + 30922^2 .

It is a cyclic number.

It is not a de Polignac number, because 1927676645 - 2⁶ = 1927676581 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 192767660 + ... + 192767669.

It is an arithmetic number, because the mean of its divisors is an integer number (578302995).

Almost surely, 2^1927676645 is an apocalyptic number.

It is an amenable number.

1927676645 is a deficient number, since it is larger than the sum of its proper divisors (385535335).

1927676645 is an equidigital number, since it uses as much as digits as its factorization.

1927676645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385535334.

The product of its digits is 3810240, while the sum is 53.

The square root of 1927676645 is about 43905.3145416361. The cubic root of 1927676645 is about 1244.5472663426.

The spelling of 1927676645 in words is "one billion, nine hundred twenty-seven million, six hundred seventy-six thousand, six hundred forty-five".