109958921 has 2 divisors, whose sum is σ = 109958922. Its totient is φ = 109958920.

The previous prime is 109958903. The next prime is 109958957. The reversal of 109958921 is 129859901.

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., 61795321 + 48163600 = 7861^2 + 6940^2 .

It is an emirp because it is prime and its reverse (129859901) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 109958921 - 2¹⁴ = 109942537 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (109958021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54979460 + 54979461.

It is an arithmetic number, because the mean of its divisors is an integer number (54979461).

Almost surely, 2^109958921 is an apocalyptic number.

It is an amenable number.

109958921 is a deficient number, since it is larger than the sum of its proper divisors (1).

109958921 is an equidigital number, since it uses as much as digits as its factorization.

109958921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58320, while the sum is 44.

The square root of 109958921 is about 10486.1299343466. The cubic root of 109958921 is about 479.0823338145.

The spelling of 109958921 in words is "one hundred nine million, nine hundred fifty-eight thousand, nine hundred twenty-one".