102742923 has 4 divisors (see below), whose sum is σ = 136990568. Its totient is φ = 68495280.

The previous prime is 102742921. The next prime is 102742931. The reversal of 102742923 is 329247201.

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

It is not a de Polignac number, because 102742923 - 2¹ = 102742921 is a prime.

It is a super-2 number, since 2×102742923² = 21112216453167858, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102742921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17123818 + ... + 17123823.

It is an arithmetic number, because the mean of its divisors is an integer number (34247642).

Almost surely, 2^102742923 is an apocalyptic number.

102742923 is a deficient number, since it is larger than the sum of its proper divisors (34247645).

102742923 is an equidigital number, since it uses as much as digits as its factorization.

102742923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34247644.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 102742923 is about 10136.2183776791. The cubic root of 102742923 is about 468.3645025403.

The spelling of 102742923 in words is "one hundred two million, seven hundred forty-two thousand, nine hundred twenty-three".