100978547 has 6 divisors (see below), whose sum is σ = 102287892. Its totient is φ = 99671492.

The previous prime is 100978541. The next prime is 100978567. The reversal of 100978547 is 745879001.

It is not a de Polignac number, because 100978547 - 2¹² = 100974451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100978541) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 90998 + ... + 92100.

It is an arithmetic number, because the mean of its divisors is an integer number (17047982).

Almost surely, 2^100978547 is an apocalyptic number.

100978547 is a deficient number, since it is larger than the sum of its proper divisors (1309345).

100978547 is an frugal number, since it uses more digits than its factorization.

100978547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2289 (or 1186 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 41.

The square root of 100978547 is about 10048.8082377962. The cubic root of 100978547 is about 465.6679758961.

The spelling of 100978547 in words is "one hundred million, nine hundred seventy-eight thousand, five hundred forty-seven".