102147479 has 4 divisors (see below), whose sum is σ = 116739984. Its totient is φ = 87554976.

The previous prime is 102147473. The next prime is 102147481. The reversal of 102147479 is 974741201.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102147479 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 (102147473) 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, 7296242 + ... + 7296255.

It is an arithmetic number, because the mean of its divisors is an integer number (29184996).

Almost surely, 2^102147479 is an apocalyptic number.

102147479 is a deficient number, since it is larger than the sum of its proper divisors (14592505).

102147479 is an equidigital number, since it uses as much as digits as its factorization.

102147479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14592504.

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 102147479 is about 10106.8035995561. The cubic root of 102147479 is about 467.4579507873.

The spelling of 102147479 in words is "one hundred two million, one hundred forty-seven thousand, four hundred seventy-nine".