61434981 has 12 divisors (see below), whose sum is σ = 88807680. Its totient is φ = 40925160.

The previous prime is 61434979. The next prime is 61435043. The reversal of 61434981 is 18943416.

61434981 is a `hidden beast` number, since 614 + 34 + 9 + 8 + 1 = 666.

It is not a de Polignac number, because 61434981 - 2¹ = 61434979 is a prime.

It is a super-2 number, since 2×61434981² = 7548513780940722, 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 an unprimeable number, because it can be changed into a prime (61434931) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19900 + ... + 22778.

It is an arithmetic number, because the mean of its divisors is an integer number (7400640).

Almost surely, 2^61434981 is an apocalyptic number.

It is an amenable number.

61434981 is a deficient number, since it is larger than the sum of its proper divisors (27372699).

61434981 is a wasteful number, since it uses less digits than its factorization.

61434981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5256 (or 5253 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 61434981 is about 7838.0470144035. The cubic root of 61434981 is about 394.5831868795.

The spelling of 61434981 in words is "sixty-one million, four hundred thirty-four thousand, nine hundred eighty-one".