68913549 has 6 divisors (see below), whose sum is σ = 99541806. Its totient is φ = 45942360.

The previous prime is 68913547. The next prime is 68913569. The reversal of 68913549 is 94531986.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 50509449 + 18404100 = 7107^2 + 4290^2 .

It is not a de Polignac number, because 68913549 - 2¹ = 68913547 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68913547) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3828522 + ... + 3828539.

It is an arithmetic number, because the mean of its divisors is an integer number (16590301).

Almost surely, 2^68913549 is an apocalyptic number.

It is an amenable number.

68913549 is a deficient number, since it is larger than the sum of its proper divisors (30628257).

68913549 is a wasteful number, since it uses less digits than its factorization.

68913549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7657067 (or 7657064 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 68913549 is about 8301.4184932456. The cubic root of 68913549 is about 409.9852245320.

It can be divided in two parts, 6891 and 3549, that added together give a triangular number (10440 = T₁₄₄).

The spelling of 68913549 in words is "sixty-eight million, nine hundred thirteen thousand, five hundred forty-nine".