684192101 has 2 divisors, whose sum is σ = 684192102. Its totient is φ = 684192100.

The previous prime is 684192077. The next prime is 684192107. The reversal of 684192101 is 101291486.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 589227076 + 94965025 = 24274^2 + 9745^2 .

It is a cyclic number.

It is not a de Polignac number, because 684192101 - 2¹⁰ = 684191077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (684192107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342096050 + 342096051.

It is an arithmetic number, because the mean of its divisors is an integer number (342096051).

Almost surely, 2^684192101 is an apocalyptic number.

It is an amenable number.

684192101 is a deficient number, since it is larger than the sum of its proper divisors (1).

684192101 is an equidigital number, since it uses as much as digits as its factorization.

684192101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 684192101 is about 26157.0659860773. The cubic root of 684192101 is about 881.1692880089.

The spelling of 684192101 in words is "six hundred eighty-four million, one hundred ninety-two thousand, one hundred one".