61430977 has 4 divisors (see below), whose sum is σ = 62472240. Its totient is φ = 60389716.

The previous prime is 61430921. The next prime is 61431001. The reversal of 61430977 is 77903416.

61430977 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61430977 - 2⁷ = 61430849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61430917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 520543 + ... + 520660.

It is an arithmetic number, because the mean of its divisors is an integer number (15618060).

Almost surely, 2^61430977 is an apocalyptic number.

It is an amenable number.

61430977 is a deficient number, since it is larger than the sum of its proper divisors (1041263).

61430977 is a wasteful number, since it uses less digits than its factorization.

61430977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1041262.

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

The square root of 61430977 is about 7837.7915894721. The cubic root of 61430977 is about 394.5746144268.

It can be divided in two parts, 614309 and 77, that added together give a triangular number (614386 = T₁₁₀₈).

The spelling of 61430977 in words is "sixty-one million, four hundred thirty thousand, nine hundred seventy-seven".