60891861 has 4 divisors (see below), whose sum is σ = 81189152. Its totient is φ = 40594572.

The previous prime is 60891821. The next prime is 60891889. The reversal of 60891861 is 16819806.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 60891861 - 2¹⁵ = 60859093 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (60891821) 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, 10148641 + ... + 10148646.

It is an arithmetic number, because the mean of its divisors is an integer number (20297288).

Almost surely, 2^60891861 is an apocalyptic number.

It is an amenable number.

60891861 is a deficient number, since it is larger than the sum of its proper divisors (20297291).

60891861 is a wasteful number, since it uses less digits than its factorization.

60891861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20297290.

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 60891861 is about 7803.3237149307. The cubic root of 60891861 is about 393.4169638477.

The spelling of 60891861 in words is "sixty million, eight hundred ninety-one thousand, eight hundred sixty-one".