109721475 has 18 divisors (see below), whose sum is σ = 196523756. Its totient is φ = 58518000.

The previous prime is 109721473. The next prime is 109721527. The reversal of 109721475 is 574127901.

It is a happy number.

It is not a de Polignac number, because 109721475 - 2¹ = 109721473 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (109721473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 243601 + ... + 244050.

Almost surely, 2^109721475 is an apocalyptic number.

109721475 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

109721475 is a deficient number, since it is larger than the sum of its proper divisors (86802281).

109721475 is a wasteful number, since it uses less digits than its factorization.

109721475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487667 (or 487659 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 36.

The square root of 109721475 is about 10474.8019074348. The cubic root of 109721475 is about 478.7372408073.

The spelling of 109721475 in words is "one hundred nine million, seven hundred twenty-one thousand, four hundred seventy-five".