106312091 has 4 divisors (see below), whose sum is σ = 106370784. Its totient is φ = 106253400.

The previous prime is 106312069. The next prime is 106312093. The reversal of 106312091 is 190213601.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 190213601 = 3061 ⋅62141.

It is a cyclic number.

It is not a de Polignac number, because 106312091 - 2⁶ = 106312027 is a prime.

It is a super-2 number, since 2×106312091² = 22604521385584562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (106312093) 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, 26540 + ... + 30281.

It is an arithmetic number, because the mean of its divisors is an integer number (26592696).

Almost surely, 2^106312091 is an apocalyptic number.

106312091 is a deficient number, since it is larger than the sum of its proper divisors (58693).

106312091 is an equidigital number, since it uses as much as digits as its factorization.

106312091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58692.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 106312091 is about 10310.7754800500. The cubic root of 106312091 is about 473.7263623241.

Adding to 106312091 its reverse (190213601), we get a palindrome (296525692).

The spelling of 106312091 in words is "one hundred six million, three hundred twelve thousand, ninety-one".