102991847 has 8 divisors (see below), whose sum is σ = 121764000. Its totient is φ = 85234464.

The previous prime is 102991829. The next prime is 102991849. The reversal of 102991847 is 748199201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 102991847 - 2¹⁴ = 102975463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102991849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 253472 + ... + 253877.

It is an arithmetic number, because the mean of its divisors is an integer number (15220500).

Almost surely, 2^102991847 is an apocalyptic number.

102991847 is a deficient number, since it is larger than the sum of its proper divisors (18772153).

102991847 is an equidigital number, since it uses as much as digits as its factorization.

102991847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507385.

The product of its (nonzero) digits is 36288, while the sum is 41.

The square root of 102991847 is about 10148.4898876631. The cubic root of 102991847 is about 468.7424462901.

The spelling of 102991847 in words is "one hundred two million, nine hundred ninety-one thousand, eight hundred forty-seven".