102543977 has 4 divisors (see below), whose sum is σ = 102680196. Its totient is φ = 102407760.

The previous prime is 102543941. The next prime is 102543979. The reversal of 102543977 is 779345201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 36917776 + 65626201 = 6076^2 + 8101^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102543977 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 102543977.

It is not an unprimeable number, because it can be changed into a prime (102543979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66974 + ... + 68487.

It is an arithmetic number, because the mean of its divisors is an integer number (25670049).

Almost surely, 2^102543977 is an apocalyptic number.

It is an amenable number.

102543977 is a deficient number, since it is larger than the sum of its proper divisors (136219).

102543977 is an equidigital number, since it uses as much as digits as its factorization.

102543977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136218.

The product of its (nonzero) digits is 52920, while the sum is 38.

The square root of 102543977 is about 10126.4000019750. The cubic root of 102543977 is about 468.0620017327.

The spelling of 102543977 in words is "one hundred two million, five hundred forty-three thousand, nine hundred seventy-seven".