60820991 has 8 divisors (see below), whose sum is σ = 75828864. Its totient is φ = 47392920.

The previous prime is 60820987. The next prime is 60820997. The reversal of 60820991 is 19902806.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 60820991 - 2² = 60820987 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 (60820997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 394865 + ... + 395018.

It is an arithmetic number, because the mean of its divisors is an integer number (9478608).

Almost surely, 2^60820991 is an apocalyptic number.

60820991 is a deficient number, since it is larger than the sum of its proper divisors (15007873).

60820991 is a wasteful number, since it uses less digits than its factorization.

60820991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 789901.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 60820991 is about 7798.7813791643. The cubic root of 60820991 is about 393.2642763153.

The spelling of 60820991 in words is "sixty million, eight hundred twenty thousand, nine hundred ninety-one".