1945680623 has 2 divisors, whose sum is σ = 1945680624. Its totient is φ = 1945680622.

The previous prime is 1945680619. The next prime is 1945680637. The reversal of 1945680623 is 3260865491.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1945680623 - 2² = 1945680619 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1945680323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 972840311 + 972840312.

It is an arithmetic number, because the mean of its divisors is an integer number (972840312).

Almost surely, 2^1945680623 is an apocalyptic number.

1945680623 is a deficient number, since it is larger than the sum of its proper divisors (1).

1945680623 is an equidigital number, since it uses as much as digits as its factorization.

1945680623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 311040, while the sum is 44.

The square root of 1945680623 is about 44109.8699045916. The cubic root of 1945680623 is about 1248.4098442215.

The spelling of 1945680623 in words is "one billion, nine hundred forty-five million, six hundred eighty thousand, six hundred twenty-three".