61602779 has 4 divisors (see below), whose sum is σ = 70403184. Its totient is φ = 52802376.

The previous prime is 61602773. The next prime is 61602799. The reversal of 61602779 is 97720616.

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 61602779 - 2⁸ = 61602523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61602773) 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, 4400192 + ... + 4400205.

It is an arithmetic number, because the mean of its divisors is an integer number (17600796).

Almost surely, 2^61602779 is an apocalyptic number.

61602779 is a deficient number, since it is larger than the sum of its proper divisors (8800405).

61602779 is an equidigital number, since it uses as much as digits as its factorization.

61602779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8800404.

The product of its (nonzero) digits is 31752, while the sum is 38.

The square root of 61602779 is about 7848.7437848359. The cubic root of 61602779 is about 394.9421033553.

The spelling of 61602779 in words is "sixty-one million, six hundred two thousand, seven hundred seventy-nine".