1109748157 has 4 divisors (see below), whose sum is σ = 1268283616. Its totient is φ = 951212700.

The previous prime is 1109748109. The next prime is 1109748203. The reversal of 1109748157 is 7518479011.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1109748157 - 2¹¹ = 1109746109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1109743157) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79267719 + ... + 79267732.

It is an arithmetic number, because the mean of its divisors is an integer number (317070904).

Almost surely, 2^1109748157 is an apocalyptic number.

It is an amenable number.

1109748157 is a deficient number, since it is larger than the sum of its proper divisors (158535459).

1109748157 is an equidigital number, since it uses as much as digits as its factorization.

1109748157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158535458.

The product of its (nonzero) digits is 70560, while the sum is 43.

The square root of 1109748157 is about 33312.8827482702. The cubic root of 1109748157 is about 1035.3204938374.

The spelling of 1109748157 in words is "one billion, one hundred nine million, seven hundred forty-eight thousand, one hundred fifty-seven".