60721749 has 24 divisors (see below), whose sum is σ = 95938752. Its totient is φ = 36702720.

The previous prime is 60721741. The next prime is 60721753. The reversal of 60721749 is 94712706.

It is a happy number.

60721749 is a `hidden beast` number, since 607 + 2 + 1 + 7 + 49 = 666.

It is not a de Polignac number, because 60721749 - 2³ = 60721741 is a prime.

It is a super-3 number, since 3×60721749³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (60721741) 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, 56592 + ... + 57654.

It is an arithmetic number, because the mean of its divisors is an integer number (3997448).

Almost surely, 2^60721749 is an apocalyptic number.

It is an amenable number.

60721749 is a deficient number, since it is larger than the sum of its proper divisors (35217003).

60721749 is a wasteful number, since it uses less digits than its factorization.

60721749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1657 (or 1654 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 60721749 is about 7792.4161208190. The cubic root of 60721749 is about 393.0502625923.

The spelling of 60721749 in words is "sixty million, seven hundred twenty-one thousand, seven hundred forty-nine".