61723775 has 6 divisors (see below), whose sum is σ = 76537512. Its totient is φ = 49379000.

The previous prime is 61723771. The next prime is 61723777. The reversal of 61723775 is 57732716.

It is not a de Polignac number, because 61723775 - 2² = 61723771 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 (61723771) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1234451 + ... + 1234500.

It is an arithmetic number, because the mean of its divisors is an integer number (12756252).

Almost surely, 2^61723775 is an apocalyptic number.

61723775 is a deficient number, since it is larger than the sum of its proper divisors (14813737).

61723775 is a wasteful number, since it uses less digits than its factorization.

61723775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2468961 (or 2468956 counting only the distinct ones).

The product of its digits is 61740, while the sum is 38.

The square root of 61723775 is about 7856.4479887542. The cubic root of 61723775 is about 395.2005070796.

The spelling of 61723775 in words is "sixty-one million, seven hundred twenty-three thousand, seven hundred seventy-five".