68937493 has 2 divisors, whose sum is σ = 68937494. Its totient is φ = 68937492.

The previous prime is 68937469. The next prime is 68937527. The reversal of 68937493 is 39473986.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65577604 + 3359889 = 8098^2 + 1833^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68937493 is a prime.

It is a super-2 number, since 2×68937493² = 9504755882250098, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68937443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34468746 + 34468747.

It is an arithmetic number, because the mean of its divisors is an integer number (34468747).

Almost surely, 2^68937493 is an apocalyptic number.

It is an amenable number.

68937493 is a deficient number, since it is larger than the sum of its proper divisors (1).

68937493 is an equidigital number, since it uses as much as digits as its factorization.

68937493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 979776, while the sum is 49.

The square root of 68937493 is about 8302.8605311664. The cubic root of 68937493 is about 410.0327021308.

The spelling of 68937493 in words is "sixty-eight million, nine hundred thirty-seven thousand, four hundred ninety-three".