60117721 has 2 divisors, whose sum is σ = 60117722. Its totient is φ = 60117720.

The previous prime is 60117713. The next prime is 60117727. The reversal of 60117721 is 12771106.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57927321 + 2190400 = 7611^2 + 1480^2 .

It is a cyclic number.

It is not a de Polignac number, because 60117721 - 2³ = 60117713 is a prime.

It is a super-2 number, since 2×60117721² = 7228280756467682, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (60117727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30058860 + 30058861.

It is an arithmetic number, because the mean of its divisors is an integer number (30058861).

Almost surely, 2^60117721 is an apocalyptic number.

It is an amenable number.

60117721 is a deficient number, since it is larger than the sum of its proper divisors (1).

60117721 is an equidigital number, since it uses as much as digits as its factorization.

60117721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 588, while the sum is 25.

The square root of 60117721 is about 7753.5618266704. The cubic root of 60117721 is about 391.7426313698.

Adding to 60117721 its reverse (12771106), we get a palindrome (72888827).

The spelling of 60117721 in words is "sixty million, one hundred seventeen thousand, seven hundred twenty-one".