61939149 has 8 divisors (see below), whose sum is σ = 82629312. Its totient is φ = 41270880.

The previous prime is 61939127. The next prime is 61939181. The reversal of 61939149 is 94193916.

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

It is not a de Polignac number, because 61939149 - 2⁵ = 61939117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61939149.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61939249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3009 + ... + 11529.

It is an arithmetic number, because the mean of its divisors is an integer number (10328664).

Almost surely, 2^61939149 is an apocalyptic number.

It is an amenable number.

61939149 is a deficient number, since it is larger than the sum of its proper divisors (20690163).

61939149 is a wasteful number, since it uses less digits than its factorization.

61939149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10947.

The product of its digits is 52488, while the sum is 42.

The square root of 61939149 is about 7870.1428830740. The cubic root of 61939149 is about 395.6596338185.

The spelling of 61939149 in words is "sixty-one million, nine hundred thirty-nine thousand, one hundred forty-nine".