106999623 has 10 divisors (see below), whose sum is σ = 159839064. Its totient is φ = 71333028.

The previous prime is 106999619. The next prime is 106999643. The reversal of 106999623 is 326999601.

It is a happy number.

106999623 is a `hidden beast` number, since 10 + 6 + 9 + 9 + 9 + 623 = 666.

It is not a de Polignac number, because 106999623 - 2² = 106999619 is a prime.

It is a super-2 number, since 2×106999623² = 22897838644284258, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (106999643) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 660411 + ... + 660572.

Almost surely, 2^106999623 is an apocalyptic number.

106999623 is a deficient number, since it is larger than the sum of its proper divisors (52839441).

106999623 is an equidigital number, since it uses as much as digits as its factorization.

106999623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1320995 (or 1320986 counting only the distinct ones).

The product of its (nonzero) digits is 157464, while the sum is 45.

The square root of 106999623 is about 10344.0622097897. The cubic root of 106999623 is about 474.7453822840.

The spelling of 106999623 in words is "one hundred six million, nine hundred ninety-nine thousand, six hundred twenty-three".