102653681 has 4 divisors (see below), whose sum is σ = 110550132. Its totient is φ = 94757232.

The previous prime is 102653647. The next prime is 102653723. The reversal of 102653681 is 186356201.

It is a happy number.

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 65869456 + 36784225 = 8116^2 + 6065^2 .

It is a cyclic number.

It is not a de Polignac number, because 102653681 - 2¹⁸ = 102391537 is a prime.

It is a super-2 number, since 2×102653681² = 21075556445699522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102653641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3948206 + ... + 3948231.

It is an arithmetic number, because the mean of its divisors is an integer number (27637533).

Almost surely, 2^102653681 is an apocalyptic number.

It is an amenable number.

102653681 is a deficient number, since it is larger than the sum of its proper divisors (7896451).

102653681 is an equidigital number, since it uses as much as digits as its factorization.

102653681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7896450.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 102653681 is about 10131.8152865121. The cubic root of 102653681 is about 468.2288568876.

The spelling of 102653681 in words is "one hundred two million, six hundred fifty-three thousand, six hundred eighty-one".