102780943 has 2 divisors, whose sum is σ = 102780944. Its totient is φ = 102780942.

The previous prime is 102780917. The next prime is 102780961. The reversal of 102780943 is 349087201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 102780943 - 2⁵ = 102780911 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102780899 and 102780908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102700943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51390471 + 51390472.

It is an arithmetic number, because the mean of its divisors is an integer number (51390472).

Almost surely, 2^102780943 is an apocalyptic number.

102780943 is a deficient number, since it is larger than the sum of its proper divisors (1).

102780943 is an equidigital number, since it uses as much as digits as its factorization.

102780943 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 102780943 is about 10138.0936570935. The cubic root of 102780943 is about 468.4222681486.

The spelling of 102780943 in words is "one hundred two million, seven hundred eighty thousand, nine hundred forty-three".