102878761 has 2 divisors, whose sum is σ = 102878762. Its totient is φ = 102878760.

The previous prime is 102878693. The next prime is 102878767. The reversal of 102878761 is 167878201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101123136 + 1755625 = 10056^2 + 1325^2 .

It is an emirp because it is prime and its reverse (167878201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 102878761 - 2¹¹ = 102876713 is a prime.

It is not a weakly prime, because it can be changed into another prime (102878767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51439380 + 51439381.

It is an arithmetic number, because the mean of its divisors is an integer number (51439381).

Almost surely, 2^102878761 is an apocalyptic number.

It is an amenable number.

102878761 is a deficient number, since it is larger than the sum of its proper divisors (1).

102878761 is an equidigital number, since it uses as much as digits as its factorization.

102878761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37632, while the sum is 40.

The square root of 102878761 is about 10142.9167895630. The cubic root of 102878761 is about 468.5708222803.

The spelling of 102878761 in words is "one hundred two million, eight hundred seventy-eight thousand, seven hundred sixty-one".