102748621 has 2 divisors, whose sum is σ = 102748622. Its totient is φ = 102748620.

The previous prime is 102748603. The next prime is 102748643. The reversal of 102748621 is 126847201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102292996 + 455625 = 10114^2 + 675^2 .

It is a cyclic number.

It is not a de Polignac number, because 102748621 - 2⁹ = 102748109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102748651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51374310 + 51374311.

It is an arithmetic number, because the mean of its divisors is an integer number (51374311).

Almost surely, 2^102748621 is an apocalyptic number.

It is an amenable number.

102748621 is a deficient number, since it is larger than the sum of its proper divisors (1).

102748621 is an equidigital number, since it uses as much as digits as its factorization.

102748621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 102748621 is about 10136.4994450747. The cubic root of 102748621 is about 468.3731606926.

The spelling of 102748621 in words is "one hundred two million, seven hundred forty-eight thousand, six hundred twenty-one".