60721389 has 24 divisors (see below), whose sum is σ = 91859040. Its totient is φ = 38600352.

The previous prime is 60721387. The next prime is 60721391. The reversal of 60721389 is 98312706.

It is an interprime number because it is at equal distance from previous prime (60721387) and next prime (60721391).

It is not a de Polignac number, because 60721389 - 2¹ = 60721387 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (60721387) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20262 + ... + 23064.

It is an arithmetic number, because the mean of its divisors is an integer number (3827460).

Almost surely, 2^60721389 is an apocalyptic number.

It is an amenable number.

60721389 is a deficient number, since it is larger than the sum of its proper divisors (31137651).

60721389 is a wasteful number, since it uses less digits than its factorization.

60721389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2921 (or 2918 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 60721389 is about 7792.3930214023. The cubic root of 60721389 is about 393.0494858339.

The spelling of 60721389 in words is "sixty million, seven hundred twenty-one thousand, three hundred eighty-nine".