78941501 has 2 divisors, whose sum is σ = 78941502. Its totient is φ = 78941500.

The previous prime is 78941491. The next prime is 78941537. The reversal of 78941501 is 10514987.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57365476 + 21576025 = 7574^2 + 4645^2 .

It is a cyclic number.

It is not a de Polignac number, because 78941501 - 2⁶ = 78941437 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78541501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39470750 + 39470751.

It is an arithmetic number, because the mean of its divisors is an integer number (39470751).

Almost surely, 2^78941501 is an apocalyptic number.

It is an amenable number.

78941501 is a deficient number, since it is larger than the sum of its proper divisors (1).

78941501 is an equidigital number, since it uses as much as digits as its factorization.

78941501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 35.

The square root of 78941501 is about 8884.9029820252. The cubic root of 78941501 is about 428.9781052103.

The spelling of 78941501 in words is "seventy-eight million, nine hundred forty-one thousand, five hundred one".