1627656673 has 2 divisors, whose sum is σ = 1627656674. Its totient is φ = 1627656672.

The previous prime is 1627656637. The next prime is 1627656689. The reversal of 1627656673 is 3766567261.

Together with previous prime (1627656637) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1601360289 + 26296384 = 40017^2 + 5128^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1627656673 is a prime.

It is a super-2 number, since 2×1627656673² = 5298532490322857858, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1627686673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 813828336 + 813828337.

It is an arithmetic number, because the mean of its divisors is an integer number (813828337).

Almost surely, 2^1627656673 is an apocalyptic number.

It is an amenable number.

1627656673 is a deficient number, since it is larger than the sum of its proper divisors (1).

1627656673 is an equidigital number, since it uses as much as digits as its factorization.

1627656673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1905120, while the sum is 49.

The square root of 1627656673 is about 40344.2272574404. The cubic root of 1627656673 is about 1176.3076850152.

The spelling of 1627656673 in words is "one billion, six hundred twenty-seven million, six hundred fifty-six thousand, six hundred seventy-three".