62909981 has 2 divisors, whose sum is σ = 62909982. Its totient is φ = 62909980.

The previous prime is 62909947. The next prime is 62910041. The reversal of 62909981 is 18990926.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61387225 + 1522756 = 7835^2 + 1234^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-62909981 is a prime.

It is a super-2 number, since 2×62909981² = 7915331418840722, 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 (62909921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31454990 + 31454991.

It is an arithmetic number, because the mean of its divisors is an integer number (31454991).

Almost surely, 2^62909981 is an apocalyptic number.

It is an amenable number.

62909981 is a deficient number, since it is larger than the sum of its proper divisors (1).

62909981 is an equidigital number, since it uses as much as digits as its factorization.

62909981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69984, while the sum is 44.

The square root of 62909981 is about 7931.5812420979. The cubic root of 62909981 is about 397.7161115360.

The spelling of 62909981 in words is "sixty-two million, nine hundred nine thousand, nine hundred eighty-one".