102945881 has 2 divisors, whose sum is σ = 102945882. Its totient is φ = 102945880.

The previous prime is 102945859. The next prime is 102945883. The reversal of 102945881 is 188549201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97614400 + 5331481 = 9880^2 + 2309^2 .

It is a cyclic number.

It is not a de Polignac number, because 102945881 - 2¹⁰ = 102944857 is a prime.

It is a super-2 number, since 2×102945881² = 21195708829732322, which contains 22 as substring.

Together with 102945883, 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 (102945883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51472940 + 51472941.

It is an arithmetic number, because the mean of its divisors is an integer number (51472941).

Almost surely, 2^102945881 is an apocalyptic number.

It is an amenable number.

102945881 is a deficient number, since it is larger than the sum of its proper divisors (1).

102945881 is an equidigital number, since it uses as much as digits as its factorization.

102945881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23040, while the sum is 38.

The square root of 102945881 is about 10146.2249630096. The cubic root of 102945881 is about 468.6727015413.

The spelling of 102945881 in words is "one hundred two million, nine hundred forty-five thousand, eight hundred eighty-one".