61977223 has 32 divisors (see below), whose sum is σ = 82736640. Its totient is φ = 44943360.

The previous prime is 61977217. The next prime is 61977239. The reversal of 61977223 is 32277916.

It is a de Polignac number, because none of the positive numbers 2^k-61977223 is a prime.

Its product of digits (31752) is a multiple of the sum of its prime divisors (567).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61977523) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 147708 + ... + 148126.

It is an arithmetic number, because the mean of its divisors is an integer number (2585520).

Almost surely, 2^61977223 is an apocalyptic number.

61977223 is a deficient number, since it is larger than the sum of its proper divisors (20759417).

61977223 is a wasteful number, since it uses less digits than its factorization.

61977223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 567.

The product of its digits is 31752, while the sum is 37.

The square root of 61977223 is about 7872.5614002051. The cubic root of 61977223 is about 395.7406878827.

The spelling of 61977223 in words is "sixty-one million, nine hundred seventy-seven thousand, two hundred twenty-three".