61450981 has 2 divisors, whose sum is σ = 61450982. Its totient is φ = 61450980.

The previous prime is 61450951. The next prime is 61451011. The reversal of 61450981 is 18905416.

It is a balanced prime because it is at equal distance from previous prime (61450951) and next prime (61451011).

It can be written as a sum of positive squares in only one way, i.e., 36360900 + 25090081 = 6030^2 + 5009^2 .

It is a cyclic number.

It is not a de Polignac number, because 61450981 - 2⁷ = 61450853 is a prime.

It is a super-2 number, since 2×61450981² = 7552446131724722, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61450951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30725490 + 30725491.

It is an arithmetic number, because the mean of its divisors is an integer number (30725491).

Almost surely, 2^61450981 is an apocalyptic number.

It is an amenable number.

61450981 is a deficient number, since it is larger than the sum of its proper divisors (1).

61450981 is an equidigital number, since it uses as much as digits as its factorization.

61450981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 61450981 is about 7839.0676103731. The cubic root of 61450981 is about 394.6174387171.

The spelling of 61450981 in words is "sixty-one million, four hundred fifty thousand, nine hundred eighty-one".