79763521 has 2 divisors, whose sum is σ = 79763522. Its totient is φ = 79763520.

The previous prime is 79763461. The next prime is 79763549. The reversal of 79763521 is 12536797.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63043600 + 16719921 = 7940^2 + 4089^2 .

It is a cyclic number.

It is not a de Polignac number, because 79763521 - 2⁷ = 79763393 is a prime.

It is not a weakly prime, because it can be changed into another prime (79763591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39881760 + 39881761.

It is an arithmetic number, because the mean of its divisors is an integer number (39881761).

Almost surely, 2^79763521 is an apocalyptic number.

It is an amenable number.

79763521 is a deficient number, since it is larger than the sum of its proper divisors (1).

79763521 is an equidigital number, since it uses as much as digits as its factorization.

79763521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 79380, while the sum is 40.

The square root of 79763521 is about 8931.0425483255. The cubic root of 79763521 is about 430.4619535137.

The spelling of 79763521 in words is "seventy-nine million, seven hundred sixty-three thousand, five hundred twenty-one".