78607601 has 2 divisors, whose sum is σ = 78607602. Its totient is φ = 78607600.

The previous prime is 78607597. The next prime is 78607649. The reversal of 78607601 is 10670687.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49014001 + 29593600 = 7001^2 + 5440^2 .

It is an emirp because it is prime and its reverse (10670687) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78607601 - 2² = 78607597 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (78607681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39303800 + 39303801.

It is an arithmetic number, because the mean of its divisors is an integer number (39303801).

Almost surely, 2^78607601 is an apocalyptic number.

It is an amenable number.

78607601 is a deficient number, since it is larger than the sum of its proper divisors (1).

78607601 is an equidigital number, since it uses as much as digits as its factorization.

78607601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 78607601 is about 8866.0927696477. The cubic root of 78607601 is about 428.3724321815.

The spelling of 78607601 in words is "seventy-eight million, six hundred seven thousand, six hundred one".