60787981 has 2 divisors, whose sum is σ = 60787982. Its totient is φ = 60787980.

The previous prime is 60787957. The next prime is 60788009. The reversal of 60787981 is 18978706.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59923081 + 864900 = 7741^2 + 930^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-60787981 is a prime.

It is a super-2 number, since 2×60787981² = 7390357268112722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (60787901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30393990 + 30393991.

It is an arithmetic number, because the mean of its divisors is an integer number (30393991).

Almost surely, 2^60787981 is an apocalyptic number.

It is an amenable number.

60787981 is a deficient number, since it is larger than the sum of its proper divisors (1).

60787981 is an equidigital number, since it uses as much as digits as its factorization.

60787981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 169344, while the sum is 46.

The square root of 60787981 is about 7796.6647356418. The cubic root of 60787981 is about 393.1931166558.

It can be divided in two parts, 607 and 87981, that added together give a palindrome (88588).

The spelling of 60787981 in words is "sixty million, seven hundred eighty-seven thousand, nine hundred eighty-one".