61374977 has 4 divisors (see below), whose sum is σ = 61643220. Its totient is φ = 61106736.

The previous prime is 61374953. The next prime is 61375001. The reversal of 61374977 is 77947316.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (61374953) and next prime (61375001).

It can be written as a sum of positive squares in 2 ways, for example, as 50112241 + 11262736 = 7079^2 + 3356^2 .

It is a cyclic number.

It is not a de Polignac number, because 61374977 - 2¹⁰ = 61373953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61374877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133778 + ... + 134235.

It is an arithmetic number, because the mean of its divisors is an integer number (15410805).

Almost surely, 2^61374977 is an apocalyptic number.

It is an amenable number.

61374977 is a deficient number, since it is larger than the sum of its proper divisors (268243).

61374977 is a wasteful number, since it uses less digits than its factorization.

61374977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268242.

The product of its digits is 222264, while the sum is 44.

The square root of 61374977 is about 7834.2183400771. The cubic root of 61374977 is about 394.4546809278.

The spelling of 61374977 in words is "sixty-one million, three hundred seventy-four thousand, nine hundred seventy-seven".