68553491 has 2 divisors, whose sum is σ = 68553492. Its totient is φ = 68553490.

The previous prime is 68553461. The next prime is 68553521. The reversal of 68553491 is 19435586.

It is a balanced prime because it is at equal distance from previous prime (68553461) and next prime (68553521).

It is a cyclic number.

It is not a de Polignac number, because 68553491 - 2⁶ = 68553427 is a prime.

It is a super-2 number, since 2×68553491² = 9399162256574162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (68553421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34276745 + 34276746.

It is an arithmetic number, because the mean of its divisors is an integer number (34276746).

Almost surely, 2^68553491 is an apocalyptic number.

68553491 is a deficient number, since it is larger than the sum of its proper divisors (1).

68553491 is an equidigital number, since it uses as much as digits as its factorization.

68553491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129600, while the sum is 41.

The square root of 68553491 is about 8279.7035574953. The cubic root of 68553491 is about 409.2699500941.

The spelling of 68553491 in words is "sixty-eight million, five hundred fifty-three thousand, four hundred ninety-one".