61436986 has 8 divisors (see below), whose sum is σ = 99244404. Its totient is φ = 28355520.

The previous prime is 61436953. The next prime is 61436989. The reversal of 61436986 is 68963416.

It can be written as a sum of positive squares in 2 ways, for example, as 60543961 + 893025 = 7781^2 + 945^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (61436989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1181455 + ... + 1181506.

Almost surely, 2^61436986 is an apocalyptic number.

61436986 is a deficient number, since it is larger than the sum of its proper divisors (37807418).

61436986 is a wasteful number, since it uses less digits than its factorization.

61436986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2362976.

The product of its digits is 186624, while the sum is 43.

The square root of 61436986 is about 7838.1749151190. The cubic root of 61436986 is about 394.5874793888.

The spelling of 61436986 in words is "sixty-one million, four hundred thirty-six thousand, nine hundred eighty-six".