109457391 has 8 divisors (see below), whose sum is σ = 152288640. Its totient is φ = 69798872.

The previous prime is 109457389. The next prime is 109457399. The reversal of 109457391 is 193754901.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 109457391 - 2¹ = 109457389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109457399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 793101 + ... + 793238.

It is an arithmetic number, because the mean of its divisors is an integer number (19036080).

Almost surely, 2^109457391 is an apocalyptic number.

109457391 is a deficient number, since it is larger than the sum of its proper divisors (42831249).

109457391 is a wasteful number, since it uses less digits than its factorization.

109457391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1586365.

The product of its (nonzero) digits is 34020, while the sum is 39.

The square root of 109457391 is about 10462.1886333597. The cubic root of 109457391 is about 478.3528480777.

It can be divided in two parts, 10945 and 7391, that added together give a triangular number (18336 = T₁₉₁).

The spelling of 109457391 in words is "one hundred nine million, four hundred fifty-seven thousand, three hundred ninety-one".