109649251 has 2 divisors, whose sum is σ = 109649252. Its totient is φ = 109649250.

The previous prime is 109649191. The next prime is 109649273. The reversal of 109649251 is 152946901.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 109649251 - 2⁷ = 109649123 is a prime.

It is a super-2 number, since 2×109649251² = 24045916489722002, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 109649251.

It is not a weakly prime, because it can be changed into another prime (109649651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54824625 + 54824626.

It is an arithmetic number, because the mean of its divisors is an integer number (54824626).

Almost surely, 2^109649251 is an apocalyptic number.

109649251 is a deficient number, since it is larger than the sum of its proper divisors (1).

109649251 is an equidigital number, since it uses as much as digits as its factorization.

109649251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 109649251 is about 10471.3538284216. The cubic root of 109649251 is about 478.6321750553.

The spelling of 109649251 in words is "one hundred nine million, six hundred forty-nine thousand, two hundred fifty-one".