108921437 has 2 divisors, whose sum is σ = 108921438. Its totient is φ = 108921436.

The previous prime is 108921427. The next prime is 108921467. The reversal of 108921437 is 734129801.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108701476 + 219961 = 10426^2 + 469^2 .

It is a cyclic number.

It is not a de Polignac number, because 108921437 - 2⁸ = 108921181 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 108921397 and 108921406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (108921427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54460718 + 54460719.

It is an arithmetic number, because the mean of its divisors is an integer number (54460719).

Almost surely, 2^108921437 is an apocalyptic number.

It is an amenable number.

108921437 is a deficient number, since it is larger than the sum of its proper divisors (1).

108921437 is an equidigital number, since it uses as much as digits as its factorization.

108921437 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 108921437 is about 10436.5433453802. The cubic root of 108921437 is about 477.5708247238.

The spelling of 108921437 in words is "one hundred eight million, nine hundred twenty-one thousand, four hundred thirty-seven".