78589741 has 2 divisors, whose sum is σ = 78589742. Its totient is φ = 78589740.

The previous prime is 78589717. The next prime is 78589783. The reversal of 78589741 is 14798587.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66015625 + 12574116 = 8125^2 + 3546^2 .

It is a cyclic number.

It is not a de Polignac number, because 78589741 - 2⁷ = 78589613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78586741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39294870 + 39294871.

It is an arithmetic number, because the mean of its divisors is an integer number (39294871).

Almost surely, 2^78589741 is an apocalyptic number.

It is an amenable number.

78589741 is a deficient number, since it is larger than the sum of its proper divisors (1).

78589741 is an equidigital number, since it uses as much as digits as its factorization.

78589741 is an evil number, because the sum of its binary digits is even.

The product of its digits is 564480, while the sum is 49.

The square root of 78589741 is about 8865.0855043818. The cubic root of 78589741 is about 428.3399870106.

The spelling of 78589741 in words is "seventy-eight million, five hundred eighty-nine thousand, seven hundred forty-one".