109392921 has 24 divisors (see below), whose sum is σ = 174466656. Its totient is φ = 65495040.

The previous prime is 109392919. The next prime is 109392931. The reversal of 109392921 is 129293901.

It is a happy number.

It is not a de Polignac number, because 109392921 - 2¹ = 109392919 is a prime.

It is a super-2 number, since 2×109392921² = 23933622329824482, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (109392931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1561 + ... + 14873.

It is an arithmetic number, because the mean of its divisors is an integer number (7269444).

Almost surely, 2^109392921 is an apocalyptic number.

109392921 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

109392921 is a deficient number, since it is larger than the sum of its proper divisors (65073735).

109392921 is a wasteful number, since it uses less digits than its factorization.

109392921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13413 (or 13410 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 36.

The square root of 109392921 is about 10459.1070842592. The cubic root of 109392921 is about 478.2589136112.

The spelling of 109392921 in words is "one hundred nine million, three hundred ninety-two thousand, nine hundred twenty-one".