102894409 has 2 divisors, whose sum is σ = 102894410. Its totient is φ = 102894408.

The previous prime is 102894403. The next prime is 102894437. The reversal of 102894409 is 904498201.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77492809 + 25401600 = 8803^2 + 5040^2 .

It is a cyclic number.

It is not a de Polignac number, because 102894409 - 2³ = 102894401 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (102894401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51447204 + 51447205.

It is an arithmetic number, because the mean of its divisors is an integer number (51447205).

Almost surely, 2^102894409 is an apocalyptic number.

It is an amenable number.

102894409 is a deficient number, since it is larger than the sum of its proper divisors (1).

102894409 is an equidigital number, since it uses as much as digits as its factorization.

102894409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 102894409 is about 10143.6881359789. The cubic root of 102894409 is about 468.5945778298.

The spelling of 102894409 in words is "one hundred two million, eight hundred ninety-four thousand, four hundred nine".