78579461 has 2 divisors, whose sum is σ = 78579462. Its totient is φ = 78579460.

The previous prime is 78579439. The next prime is 78579467. The reversal of 78579461 is 16497587.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77986561 + 592900 = 8831^2 + 770^2 .

It is an emirp because it is prime and its reverse (16497587) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78579461 - 2¹⁴ = 78563077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78579467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39289730 + 39289731.

It is an arithmetic number, because the mean of its divisors is an integer number (39289731).

Almost surely, 2^78579461 is an apocalyptic number.

It is an amenable number.

78579461 is a deficient number, since it is larger than the sum of its proper divisors (1).

78579461 is an equidigital number, since it uses as much as digits as its factorization.

78579461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 423360, while the sum is 47.

The square root of 78579461 is about 8864.5056827778. The cubic root of 78579461 is about 428.3213097336.

The spelling of 78579461 in words is "seventy-eight million, five hundred seventy-nine thousand, four hundred sixty-one".