68569649 has 4 divisors (see below), whose sum is σ = 70164336. Its totient is φ = 66974964.

The previous prime is 68569603. The next prime is 68569661. The reversal of 68569649 is 94696586.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94696586 = 2 ⋅47348293.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68569649 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68569649.

It is not an unprimeable number, because it can be changed into a prime (68569679) 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, 797279 + ... + 797364.

It is an arithmetic number, because the mean of its divisors is an integer number (17541084).

Almost surely, 2^68569649 is an apocalyptic number.

It is an amenable number.

68569649 is a deficient number, since it is larger than the sum of its proper divisors (1594687).

68569649 is a wasteful number, since it uses less digits than its factorization.

68569649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1594686.

The product of its digits is 2799360, while the sum is 53.

The square root of 68569649 is about 8280.6792595777. The cubic root of 68569649 is about 409.3021024288.

The spelling of 68569649 in words is "sixty-eight million, five hundred sixty-nine thousand, six hundred forty-nine".