60813521 has 2 divisors, whose sum is σ = 60813522. Its totient is φ = 60813520.

The previous prime is 60813517. The next prime is 60813553. The reversal of 60813521 is 12531806.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50922496 + 9891025 = 7136^2 + 3145^2 .

It is a cyclic number.

It is not a de Polignac number, because 60813521 - 2² = 60813517 is a prime.

It is not a weakly prime, because it can be changed into another prime (60813821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30406760 + 30406761.

It is an arithmetic number, because the mean of its divisors is an integer number (30406761).

Almost surely, 2^60813521 is an apocalyptic number.

It is an amenable number.

60813521 is a deficient number, since it is larger than the sum of its proper divisors (1).

60813521 is an equidigital number, since it uses as much as digits as its factorization.

60813521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 60813521 is about 7798.3024434809. The cubic root of 60813521 is about 393.2481754902.

The spelling of 60813521 in words is "sixty million, eight hundred thirteen thousand, five hundred twenty-one".