61431449 has 8 divisors (see below), whose sum is σ = 63180000. Its totient is φ = 59706592.

The previous prime is 61431373. The next prime is 61431479. The reversal of 61431449 is 94413416.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61431449 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61431479) 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, 599 + ... + 11100.

It is an arithmetic number, because the mean of its divisors is an integer number (7897500).

Almost surely, 2^61431449 is an apocalyptic number.

It is an amenable number.

61431449 is a deficient number, since it is larger than the sum of its proper divisors (1748551).

61431449 is a wasteful number, since it uses less digits than its factorization.

61431449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11847.

The product of its digits is 10368, while the sum is 32.

The square root of 61431449 is about 7837.8216999368. The cubic root of 61431449 is about 394.5756249850.

The spelling of 61431449 in words is "sixty-one million, four hundred thirty-one thousand, four hundred forty-nine".