61538949 has 12 divisors (see below), whose sum is σ = 89107200. Its totient is φ = 40925544.

The previous prime is 61538923. The next prime is 61538969. The reversal of 61538949 is 94983516.

It is a happy number.

It is not a de Polignac number, because 61538949 - 2⁸ = 61538693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61538969) 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 in 11 ways as a sum of consecutive naturals, for example, 4389 + ... + 11930.

It is an arithmetic number, because the mean of its divisors is an integer number (7425600).

Almost surely, 2^61538949 is an apocalyptic number.

It is an amenable number.

61538949 is a deficient number, since it is larger than the sum of its proper divisors (27568251).

61538949 is a wasteful number, since it uses less digits than its factorization.

61538949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16744 (or 16741 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 61538949 is about 7844.6764751645. The cubic root of 61538949 is about 394.8056491956.

The spelling of 61538949 in words is "sixty-one million, five hundred thirty-eight thousand, nine hundred forty-nine".