62161681 has 2 divisors, whose sum is σ = 62161682. Its totient is φ = 62161680.

The previous prime is 62161657. The next prime is 62161691. The reversal of 62161681 is 18616126.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62157456 + 4225 = 7884^2 + 65^2 .

It is a cyclic number.

It is not a de Polignac number, because 62161681 - 2⁷ = 62161553 is a prime.

It is a super-2 number, since 2×62161681² = 7728149169491522, which contains 22 as substring.

It is equal to p_3682660 and since 62161681 and 3682660 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (62161621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31080840 + 31080841.

It is an arithmetic number, because the mean of its divisors is an integer number (31080841).

Almost surely, 2^62161681 is an apocalyptic number.

It is an amenable number.

62161681 is a deficient number, since it is larger than the sum of its proper divisors (1).

62161681 is an equidigital number, since it uses as much as digits as its factorization.

62161681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 31.

The square root of 62161681 is about 7884.2679431891. The cubic root of 62161681 is about 396.1329031343.

The spelling of 62161681 in words is "sixty-two million, one hundred sixty-one thousand, six hundred eighty-one".