100129849 has 4 divisors (see below), whose sum is σ = 100277136. Its totient is φ = 99982564.

The previous prime is 100129823. The next prime is 100129859. The reversal of 100129849 is 948921001.

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: 948921001 = 7 ⋅135560143.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100129849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100129819) 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, 72619 + ... + 73984.

It is an arithmetic number, because the mean of its divisors is an integer number (25069284).

Almost surely, 2^100129849 is an apocalyptic number.

It is an amenable number.

100129849 is a deficient number, since it is larger than the sum of its proper divisors (147287).

100129849 is an equidigital number, since it uses as much as digits as its factorization.

100129849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147286.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 100129849 is about 10006.4903437719. The cubic root of 100129849 is about 464.3596983571.

The spelling of 100129849 in words is "one hundred million, one hundred twenty-nine thousand, eight hundred forty-nine".