60999905 has 16 divisors (see below), whose sum is σ = 76522320. Its totient is φ = 46620672.

The previous prime is 60999871. The next prime is 60999907. The reversal of 60999905 is 50999906.

It can be written as a sum of positive squares in 8 ways, for example, as 10291264 + 50708641 = 3208^2 + 7121^2 .

It is a cyclic number.

It is not a de Polignac number, because 60999905 - 2²⁰ = 59951329 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 60999905.

It is not an unprimeable number, because it can be changed into a prime (60999907) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11897 + ... + 16233.

It is an arithmetic number, because the mean of its divisors is an integer number (4782645).

Almost surely, 2^60999905 is an apocalyptic number.

It is an amenable number.

60999905 is a deficient number, since it is larger than the sum of its proper divisors (15522415).

60999905 is a wasteful number, since it uses less digits than its factorization.

60999905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4468.

The product of its (nonzero) digits is 196830, while the sum is 47.

The square root of 60999905 is about 7810.2435941525. The cubic root of 60999905 is about 393.6495139564.

Subtracting from 60999905 its reverse (50999906), we obtain a palindrome (9999999).

The spelling of 60999905 in words is "sixty million, nine hundred ninety-nine thousand, nine hundred five".