68772551 has 2 divisors, whose sum is σ = 68772552. Its totient is φ = 68772550.

The previous prime is 68772547. The next prime is 68772563. The reversal of 68772551 is 15527786.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68772551 - 2² = 68772547 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 68772499 and 68772508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68772251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34386275 + 34386276.

It is an arithmetic number, because the mean of its divisors is an integer number (34386276).

Almost surely, 2^68772551 is an apocalyptic number.

68772551 is a deficient number, since it is larger than the sum of its proper divisors (1).

68772551 is an equidigital number, since it uses as much as digits as its factorization.

68772551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 117600, while the sum is 41.

The square root of 68772551 is about 8292.9217408583. The cubic root of 68772551 is about 409.7054219528.

The spelling of 68772551 in words is "sixty-eight million, seven hundred seventy-two thousand, five hundred fifty-one".