68437577 has 4 divisors (see below), whose sum is σ = 73702020. Its totient is φ = 63173136.

The previous prime is 68437571. The next prime is 68437583. The reversal of 68437577 is 77573486.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 77573486 = 2 ⋅38786743.

It is an interprime number because it is at equal distance from previous prime (68437571) and next prime (68437583).

It can be written as a sum of positive squares in 2 ways, for example, as 38800441 + 29637136 = 6229^2 + 5444^2 .

It is not a de Polignac number, because 68437577 - 2⁸ = 68437321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68437571) 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, 2632202 + ... + 2632227.

It is an arithmetic number, because the mean of its divisors is an integer number (18425505).

Almost surely, 2^68437577 is an apocalyptic number.

It is an amenable number.

68437577 is a deficient number, since it is larger than the sum of its proper divisors (5264443).

68437577 is a wasteful number, since it uses less digits than its factorization.

68437577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5264442.

The product of its digits is 987840, while the sum is 47.

The square root of 68437577 is about 8272.7007077496. The cubic root of 68437577 is about 409.0391479397.

The spelling of 68437577 in words is "sixty-eight million, four hundred thirty-seven thousand, five hundred seventy-seven".