1017881957 has 2 divisors, whose sum is σ = 1017881958. Its totient is φ = 1017881956.

The previous prime is 1017881923. The next prime is 1017881971. The reversal of 1017881957 is 7591887101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 523219876 + 494662081 = 22874^2 + 22241^2 .

It is an emirp because it is prime and its reverse (7591887101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1017881957 - 2²⁸ = 749446501 is a prime.

It is a super-2 number, since 2×1017881957² = 2072167356772299698, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1017881057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 508940978 + 508940979.

It is an arithmetic number, because the mean of its divisors is an integer number (508940979).

Almost surely, 2^1017881957 is an apocalyptic number.

It is an amenable number.

1017881957 is a deficient number, since it is larger than the sum of its proper divisors (1).

1017881957 is an equidigital number, since it uses as much as digits as its factorization.

1017881957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 141120, while the sum is 47.

The square root of 1017881957 is about 31904.2623641419. The cubic root of 1017881957 is about 1005.9254717675.

The spelling of 1017881957 in words is "one billion, seventeen million, eight hundred eighty-one thousand, nine hundred fifty-seven".