109709557 has 2 divisors, whose sum is σ = 109709558. Its totient is φ = 109709556.

The previous prime is 109709543. The next prime is 109709569. The reversal of 109709557 is 755907901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96648561 + 13060996 = 9831^2 + 3614^2 .

It is a cyclic number.

It is not a de Polignac number, because 109709557 - 2⁷ = 109709429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109709357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54854778 + 54854779.

It is an arithmetic number, because the mean of its divisors is an integer number (54854779).

Almost surely, 2^109709557 is an apocalyptic number.

It is an amenable number.

109709557 is a deficient number, since it is larger than the sum of its proper divisors (1).

109709557 is an equidigital number, since it uses as much as digits as its factorization.

109709557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 99225, while the sum is 43.

The square root of 109709557 is about 10474.2330029458. The cubic root of 109709557 is about 478.7199066224.

The spelling of 109709557 in words is "one hundred nine million, seven hundred nine thousand, five hundred fifty-seven".