1680201277 has 6 divisors (see below), whose sum is σ = 1705657758. Its totient is φ = 1655119224.

The previous prime is 1680201269. The next prime is 1680201329. The reversal of 1680201277 is 7721020861.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 876988996 + 803212281 = 29614^2 + 28341^2 .

It is not a de Polignac number, because 1680201277 - 2³ = 1680201269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1680201077) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 182658 + ... + 191635.

It is an arithmetic number, because the mean of its divisors is an integer number (284276293).

Almost surely, 2^1680201277 is an apocalyptic number.

It is an amenable number.

1680201277 is a deficient number, since it is larger than the sum of its proper divisors (25456481).

1680201277 is an frugal number, since it uses more digits than its factorization.

1680201277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374427 (or 374360 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 34.

The square root of 1680201277 is about 40990.2583182883. The cubic root of 1680201277 is about 1188.8318638464.

The spelling of 1680201277 in words is "one billion, six hundred eighty million, two hundred one thousand, two hundred seventy-seven".