1655287001 has 2 divisors, whose sum is σ = 1655287002. Its totient is φ = 1655287000.

The previous prime is 1655286979. The next prime is 1655287003. The reversal of 1655287001 is 1007825561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 950118976 + 705168025 = 30824^2 + 26555^2 .

It is an emirp because it is prime and its reverse (1007825561) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1655287001 is a prime.

Together with 1655287003, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1655287003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 827643500 + 827643501.

It is an arithmetic number, because the mean of its divisors is an integer number (827643501).

Almost surely, 2^1655287001 is an apocalyptic number.

It is an amenable number.

1655287001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1655287001 is an equidigital number, since it uses as much as digits as its factorization.

1655287001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16800, while the sum is 35.

The square root of 1655287001 is about 40685.2184583050. The cubic root of 1655287001 is about 1182.9265195696.

The spelling of 1655287001 in words is "one billion, six hundred fifty-five million, two hundred eighty-seven thousand, one".