61551727 has 2 divisors, whose sum is σ = 61551728. Its totient is φ = 61551726.

The previous prime is 61551689. The next prime is 61551733. The reversal of 61551727 is 72715516.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61551727 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61551692 and 61551701.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61551227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30775863 + 30775864.

It is an arithmetic number, because the mean of its divisors is an integer number (30775864).

Almost surely, 2^61551727 is an apocalyptic number.

61551727 is a deficient number, since it is larger than the sum of its proper divisors (1).

61551727 is an equidigital number, since it uses as much as digits as its factorization.

61551727 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14700, while the sum is 34.

The square root of 61551727 is about 7845.4908705574. The cubic root of 61551727 is about 394.8329732321.

The spelling of 61551727 in words is "sixty-one million, five hundred fifty-one thousand, seven hundred twenty-seven".