61549797 has 8 divisors (see below), whose sum is σ = 86385760. Its totient is φ = 38873520.

The previous prime is 61549753. The next prime is 61549799. The reversal of 61549797 is 79794516.

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 61549797 - 2¹⁶ = 61484261 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 (61549799) 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, 539854 + ... + 539967.

It is an arithmetic number, because the mean of its divisors is an integer number (10798220).

Almost surely, 2^61549797 is an apocalyptic number.

It is an amenable number.

61549797 is a deficient number, since it is larger than the sum of its proper divisors (24835963).

61549797 is a wasteful number, since it uses less digits than its factorization.

61549797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1079843.

The product of its digits is 476280, while the sum is 48.

The square root of 61549797 is about 7845.3678690040. The cubic root of 61549797 is about 394.8288464288.

It can be divided in two parts, 6154 and 9797, that added together give a palindrome (15951).

The spelling of 61549797 in words is "sixty-one million, five hundred forty-nine thousand, seven hundred ninety-seven".