83640123 has 24 divisors (see below), whose sum is σ = 141444576. Its totient is φ = 46627200.

The previous prime is 83640103. The next prime is 83640143. The reversal of 83640123 is 32104638.

It is a happy number.

83640123 is a `hidden beast` number, since 8 + 3 + 640 + 12 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (83640103) and next prime (83640143).

It is not a de Polignac number, because 83640123 - 2¹³ = 83631931 is a prime.

It is not an unprimeable number, because it can be changed into a prime (83640103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13608 + ... + 18773.

It is an arithmetic number, because the mean of its divisors is an integer number (5893524).

Almost surely, 2^83640123 is an apocalyptic number.

83640123 is a deficient number, since it is larger than the sum of its proper divisors (57804453).

83640123 is a wasteful number, since it uses less digits than its factorization.

83640123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32435 (or 32432 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 83640123 is about 9145.4974167620. The cubic root of 83640123 is about 437.3255868589.

The spelling of 83640123 in words is "eighty-three million, six hundred forty thousand, one hundred twenty-three".