61547949 has 12 divisors (see below), whose sum is σ = 89544000. Its totient is φ = 40735944.

The previous prime is 61547933. The next prime is 61547951. The reversal of 61547949 is 94974516.

61547949 is a `hidden beast` number, since 61 + 547 + 9 + 49 = 666.

It is not a de Polignac number, because 61547949 - 2⁴ = 61547933 is a prime.

It is a super-2 number, since 2×61547949² = 7576300052213202, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61545949) 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, 23349 + ... + 25850.

It is an arithmetic number, because the mean of its divisors is an integer number (7462000).

Almost surely, 2^61547949 is an apocalyptic number.

It is an amenable number.

61547949 is a deficient number, since it is larger than the sum of its proper divisors (27996051).

61547949 is a wasteful number, since it uses less digits than its factorization.

61547949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49344 (or 49341 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 61547949 is about 7845.2500916159. The cubic root of 61547949 is about 394.8248948804.

The spelling of 61547949 in words is "sixty-one million, five hundred forty-seven thousand, nine hundred forty-nine".