61677247 has 2 divisors, whose sum is σ = 61677248. Its totient is φ = 61677246.

The previous prime is 61677223. The next prime is 61677251. The reversal of 61677247 is 74277616.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61677247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61677347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30838623 + 30838624.

It is an arithmetic number, because the mean of its divisors is an integer number (30838624).

Almost surely, 2^61677247 is an apocalyptic number.

61677247 is a deficient number, since it is larger than the sum of its proper divisors (1).

61677247 is an equidigital number, since it uses as much as digits as its factorization.

61677247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 98784, while the sum is 40.

The square root of 61677247 is about 7853.4862959071. The cubic root of 61677247 is about 395.1011800836.

The spelling of 61677247 in words is "sixty-one million, six hundred seventy-seven thousand, two hundred forty-seven".