61420917 has 8 divisors (see below), whose sum is σ = 82015840. Its totient is φ = 40886640.

The previous prime is 61420873. The next prime is 61420921. The reversal of 61420917 is 71902416.

It is a happy number.

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

It is not a de Polignac number, because 61420917 - 2⁸ = 61420661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61420937) 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, 12742 + ... + 16887.

It is an arithmetic number, because the mean of its divisors is an integer number (10251980).

Almost surely, 2^61420917 is an apocalyptic number.

It is an amenable number.

61420917 is a deficient number, since it is larger than the sum of its proper divisors (20594923).

61420917 is a wasteful number, since it uses less digits than its factorization.

61420917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30323.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 61420917 is about 7837.1498007885. The cubic root of 61420917 is about 394.5530746026.

The spelling of 61420917 in words is "sixty-one million, four hundred twenty thousand, nine hundred seventeen".