100771047 has 40 divisors (see below), whose sum is σ = 164209584. Its totient is φ = 61212672.

The previous prime is 100771043. The next prime is 100771061. The reversal of 100771047 is 740177001.

It is not a de Polignac number, because 100771047 - 2² = 100771043 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 100771047.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100771043) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 86823 + ... + 87975.

Almost surely, 2^100771047 is an apocalyptic number.

100771047 is a deficient number, since it is larger than the sum of its proper divisors (63438537).

100771047 is a wasteful number, since it uses less digits than its factorization.

100771047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1261 (or 1252 counting only the distinct ones).

The product of its (nonzero) digits is 1372, while the sum is 27.

The square root of 100771047 is about 10038.4783209409. The cubic root of 100771047 is about 465.3487913797.

The spelling of 100771047 in words is "one hundred million, seven hundred seventy-one thousand, forty-seven".