61779123 has 12 divisors (see below), whose sum is σ = 101984688. Its totient is φ = 35302320.

The previous prime is 61779121. The next prime is 61779149. The reversal of 61779123 is 32197716.

It is a happy number.

It is not a de Polignac number, because 61779123 - 2¹ = 61779121 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (61779121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 490248 + ... + 490373.

It is an arithmetic number, because the mean of its divisors is an integer number (8498724).

Almost surely, 2^61779123 is an apocalyptic number.

61779123 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

61779123 is a deficient number, since it is larger than the sum of its proper divisors (40205565).

61779123 is a wasteful number, since it uses less digits than its factorization.

61779123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 980634 (or 980631 counting only the distinct ones).

The product of its digits is 15876, while the sum is 36.

The square root of 61779123 is about 7859.9696564300. The cubic root of 61779123 is about 395.3185978416.

The spelling of 61779123 in words is "sixty-one million, seven hundred seventy-nine thousand, one hundred twenty-three".