60721357 has 4 divisors (see below), whose sum is σ = 63361440. Its totient is φ = 58081276.

The previous prime is 60721333. The next prime is 60721361. The reversal of 60721357 is 75312706.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-60721357 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (60721307) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1320007 + ... + 1320052.

It is an arithmetic number, because the mean of its divisors is an integer number (15840360).

Almost surely, 2^60721357 is an apocalyptic number.

It is an amenable number.

60721357 is a deficient number, since it is larger than the sum of its proper divisors (2640083).

60721357 is a wasteful number, since it uses less digits than its factorization.

60721357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2640082.

The product of its (nonzero) digits is 8820, while the sum is 31.

The square root of 60721357 is about 7792.3909681176. The cubic root of 60721357 is about 393.0494167886.

The spelling of 60721357 in words is "sixty million, seven hundred twenty-one thousand, three hundred fifty-seven".