109779493 has 2 divisors, whose sum is σ = 109779494. Its totient is φ = 109779492.

The previous prime is 109779479. The next prime is 109779497. The reversal of 109779493 is 394977901.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98069409 + 11710084 = 9903^2 + 3422^2 .

It is a cyclic number.

It is not a de Polignac number, because 109779493 - 2¹³ = 109771301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109779497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54889746 + 54889747.

It is an arithmetic number, because the mean of its divisors is an integer number (54889747).

Almost surely, 2^109779493 is an apocalyptic number.

It is an amenable number.

109779493 is a deficient number, since it is larger than the sum of its proper divisors (1).

109779493 is an equidigital number, since it uses as much as digits as its factorization.

109779493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 428652, while the sum is 49.

The square root of 109779493 is about 10477.5709494138. The cubic root of 109779493 is about 478.8216074063.

The spelling of 109779493 in words is "one hundred nine million, seven hundred seventy-nine thousand, four hundred ninety-three".