109478731 has 4 divisors (see below), whose sum is σ = 112024792. Its totient is φ = 106932672.

The previous prime is 109478711. The next prime is 109478749. The reversal of 109478731 is 137874901.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 109478731 - 2²³ = 101090123 is a prime.

It is a super-2 number, since 2×109478731² = 23971185082740722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (109478711) 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, 1272966 + ... + 1273051.

It is an arithmetic number, because the mean of its divisors is an integer number (28006198).

Almost surely, 2^109478731 is an apocalyptic number.

109478731 is a deficient number, since it is larger than the sum of its proper divisors (2546061).

109478731 is an equidigital number, since it uses as much as digits as its factorization.

109478731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2546060.

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 109478731 is about 10463.2084467433. The cubic root of 109478731 is about 478.3839328872.

The spelling of 109478731 in words is "one hundred nine million, four hundred seventy-eight thousand, seven hundred thirty-one".