61329977 has 2 divisors, whose sum is σ = 61329978. Its totient is φ = 61329976.

The previous prime is 61329953. The next prime is 61330019. The reversal of 61329977 is 77992316.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53816896 + 7513081 = 7336^2 + 2741^2 .

It is a cyclic number.

It is not a de Polignac number, because 61329977 - 2⁶ = 61329913 is a prime.

It is a super-2 number, since 2×61329977² = 7522732157641058, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (61329077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30664988 + 30664989.

It is an arithmetic number, because the mean of its divisors is an integer number (30664989).

Almost surely, 2^61329977 is an apocalyptic number.

It is an amenable number.

61329977 is a deficient number, since it is larger than the sum of its proper divisors (1).

61329977 is an equidigital number, since it uses as much as digits as its factorization.

61329977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 142884, while the sum is 44.

The square root of 61329977 is about 7831.3457974987. The cubic root of 61329977 is about 394.3582529182.

The spelling of 61329977 in words is "sixty-one million, three hundred twenty-nine thousand, nine hundred seventy-seven".