61728367 has 2 divisors, whose sum is σ = 61728368. Its totient is φ = 61728366.

The previous prime is 61728319. The next prime is 61728391. The reversal of 61728367 is 76382716.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61728367 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61798367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30864183 + 30864184.

It is an arithmetic number, because the mean of its divisors is an integer number (30864184).

Almost surely, 2^61728367 is an apocalyptic number.

61728367 is a deficient number, since it is larger than the sum of its proper divisors (1).

61728367 is an equidigital number, since it uses as much as digits as its factorization.

61728367 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84672, while the sum is 40.

The square root of 61728367 is about 7856.7402273462. The cubic root of 61728367 is about 395.2103072780.

The spelling of 61728367 in words is "sixty-one million, seven hundred twenty-eight thousand, three hundred sixty-seven".