102730791 has 4 divisors (see below), whose sum is σ = 136974392. Its totient is φ = 68487192.

The previous prime is 102730787. The next prime is 102730799. The reversal of 102730791 is 197037201.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 102730791 - 2² = 102730787 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 (102730799) 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, 17121796 + ... + 17121801.

It is an arithmetic number, because the mean of its divisors is an integer number (34243598).

Almost surely, 2^102730791 is an apocalyptic number.

102730791 is a deficient number, since it is larger than the sum of its proper divisors (34243601).

102730791 is an equidigital number, since it uses as much as digits as its factorization.

102730791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34243600.

The product of its (nonzero) digits is 2646, while the sum is 30.

The square root of 102730791 is about 10135.6199119738. The cubic root of 102730791 is about 468.3460668121.

Adding to 102730791 its reverse (197037201), we get a palindrome (299767992).

The spelling of 102730791 in words is "one hundred two million, seven hundred thirty thousand, seven hundred ninety-one".