61387679 has 2 divisors, whose sum is σ = 61387680. Its totient is φ = 61387678.

The previous prime is 61387673. The next prime is 61387721. The reversal of 61387679 is 97678316.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61387679 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 (61387673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30693839 + 30693840.

It is an arithmetic number, because the mean of its divisors is an integer number (30693840).

Almost surely, 2^61387679 is an apocalyptic number.

61387679 is a deficient number, since it is larger than the sum of its proper divisors (1).

61387679 is an equidigital number, since it uses as much as digits as its factorization.

61387679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 381024, while the sum is 47.

The square root of 61387679 is about 7835.0289725055. The cubic root of 61387679 is about 394.4818908104.

The spelling of 61387679 in words is "sixty-one million, three hundred eighty-seven thousand, six hundred seventy-nine".