79649477 has 2 divisors, whose sum is σ = 79649478. Its totient is φ = 79649476.

The previous prime is 79649473. The next prime is 79649543. The reversal of 79649477 is 77494697.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54257956 + 25391521 = 7366^2 + 5039^2 .

It is a cyclic number.

It is not a de Polignac number, because 79649477 - 2² = 79649473 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79649473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39824738 + 39824739.

It is an arithmetic number, because the mean of its divisors is an integer number (39824739).

Almost surely, 2^79649477 is an apocalyptic number.

It is an amenable number.

79649477 is a deficient number, since it is larger than the sum of its proper divisors (1).

79649477 is an equidigital number, since it uses as much as digits as its factorization.

79649477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2667168, while the sum is 53.

The square root of 79649477 is about 8924.6555675835. The cubic root of 79649477 is about 430.2567008799.

The spelling of 79649477 in words is "seventy-nine million, six hundred forty-nine thousand, four hundred seventy-seven".