109651643 has 2 divisors, whose sum is σ = 109651644. Its totient is φ = 109651642.

The previous prime is 109651583. The next prime is 109651651. The reversal of 109651643 is 346156901.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 109651643 - 2¹⁴ = 109635259 is a prime.

It is a Chen prime.

It is equal to p_6284465 and since 109651643 and 6284465 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (109651693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54825821 + 54825822.

It is an arithmetic number, because the mean of its divisors is an integer number (54825822).

Almost surely, 2^109651643 is an apocalyptic number.

109651643 is a deficient number, since it is larger than the sum of its proper divisors (1).

109651643 is an equidigital number, since it uses as much as digits as its factorization.

109651643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 109651643 is about 10471.4680441665. The cubic root of 109651643 is about 478.6356554859.

The spelling of 109651643 in words is "one hundred nine million, six hundred fifty-one thousand, six hundred forty-three".