79729801 has 2 divisors, whose sum is σ = 79729802. Its totient is φ = 79729800.

The previous prime is 79729759. The next prime is 79729807. The reversal of 79729801 is 10892797.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73359225 + 6370576 = 8565^2 + 2524^2 .

It is an emirp because it is prime and its reverse (10892797) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79729801 - 2⁷ = 79729673 is a prime.

It is not a weakly prime, because it can be changed into another prime (79729807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39864900 + 39864901.

It is an arithmetic number, because the mean of its divisors is an integer number (39864901).

Almost surely, 2^79729801 is an apocalyptic number.

It is an amenable number.

79729801 is a deficient number, since it is larger than the sum of its proper divisors (1).

79729801 is an equidigital number, since it uses as much as digits as its factorization.

79729801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63504, while the sum is 43.

The square root of 79729801 is about 8929.1545512439. The cubic root of 79729801 is about 430.4012857515.

The spelling of 79729801 in words is "seventy-nine million, seven hundred twenty-nine thousand, eight hundred one".