60721861 has 4 divisors (see below), whose sum is σ = 62202924. Its totient is φ = 59240800.

The previous prime is 60721831. The next prime is 60721873. The reversal of 60721861 is 16812706.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32832900 + 27888961 = 5730^2 + 5281^2 .

It is a cyclic number.

It is not a de Polignac number, because 60721861 - 2¹³ = 60713669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (60721811) 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, 740470 + ... + 740551.

It is an arithmetic number, because the mean of its divisors is an integer number (15550731).

Almost surely, 2^60721861 is an apocalyptic number.

It is an amenable number.

60721861 is a deficient number, since it is larger than the sum of its proper divisors (1481063).

60721861 is a wasteful number, since it uses less digits than its factorization.

60721861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1481062.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 60721861 is about 7792.4233072902. The cubic root of 60721861 is about 393.0505042498.

The spelling of 60721861 in words is "sixty million, seven hundred twenty-one thousand, eight hundred sixty-one".