61949759 has 4 divisors (see below), whose sum is σ = 62036640. Its totient is φ = 61862880.

The previous prime is 61949753. The next prime is 61949761. The reversal of 61949759 is 95794916.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61949759 - 2¹⁶ = 61884223 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 (61949753) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42362 + ... + 43799.

It is an arithmetic number, because the mean of its divisors is an integer number (15509160).

Almost surely, 2^61949759 is an apocalyptic number.

61949759 is a deficient number, since it is larger than the sum of its proper divisors (86881).

61949759 is an equidigital number, since it uses as much as digits as its factorization.

61949759 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86880.

The product of its digits is 612360, while the sum is 50.

The square root of 61949759 is about 7870.8169207523. The cubic root of 61949759 is about 395.6822243185.

The spelling of 61949759 in words is "sixty-one million, nine hundred forty-nine thousand, seven hundred fifty-nine".