109861957 has 4 divisors (see below), whose sum is σ = 110011360. Its totient is φ = 109712556.

The previous prime is 109861949. The next prime is 109861979. The reversal of 109861957 is 759168901.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 759168901 = 673 ⋅1128037.

It is a cyclic number.

It is not a de Polignac number, because 109861957 - 2³ = 109861949 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 (109861937) 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, 73593 + ... + 75070.

It is an arithmetic number, because the mean of its divisors is an integer number (27502840).

Almost surely, 2^109861957 is an apocalyptic number.

109861957 is the 6052-nd hex number.

It is an amenable number.

109861957 is a deficient number, since it is larger than the sum of its proper divisors (149403).

109861957 is an equidigital number, since it uses as much as digits as its factorization.

109861957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149402.

The product of its (nonzero) digits is 136080, while the sum is 46.

The square root of 109861957 is about 10481.5054739288. The cubic root of 109861957 is about 478.9414709047.

The spelling of 109861957 in words is "one hundred nine million, eight hundred sixty-one thousand, nine hundred fifty-seven".