1676957221 has 2 divisors, whose sum is σ = 1676957222. Its totient is φ = 1676957220.

The previous prime is 1676957213. The next prime is 1676957239. The reversal of 1676957221 is 1227596761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 938748321 + 738208900 = 30639^2 + 27170^2 .

It is an emirp because it is prime and its reverse (1227596761) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1676957221 - 2³ = 1676957213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1676957201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 838478610 + 838478611.

It is an arithmetic number, because the mean of its divisors is an integer number (838478611).

Almost surely, 2^1676957221 is an apocalyptic number.

It is an amenable number.

1676957221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1676957221 is an equidigital number, since it uses as much as digits as its factorization.

1676957221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 317520, while the sum is 46.

The square root of 1676957221 is about 40950.6681386275. The cubic root of 1676957221 is about 1188.0662567864.

The spelling of 1676957221 in words is "one billion, six hundred seventy-six million, nine hundred fifty-seven thousand, two hundred twenty-one".