101812949 has 32 divisors (see below), whose sum is σ = 127961856. Its totient is φ = 79027200.

The previous prime is 101812943. The next prime is 101812957. The reversal of 101812949 is 949218101.

It is not a de Polignac number, because 101812949 - 2²⁰ = 100764373 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101812943) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 516719 + ... + 516915.

It is an arithmetic number, because the mean of its divisors is an integer number (3998808).

Almost surely, 2^101812949 is an apocalyptic number.

It is an amenable number.

101812949 is a deficient number, since it is larger than the sum of its proper divisors (26148907).

101812949 is a wasteful number, since it uses less digits than its factorization.

101812949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365.

The product of its (nonzero) digits is 5184, while the sum is 35.

The square root of 101812949 is about 10090.2402845522. The cubic root of 101812949 is about 466.9470889987.

The spelling of 101812949 in words is "one hundred one million, eight hundred twelve thousand, nine hundred forty-nine".