54190861 has 4 divisors (see below), whose sum is σ = 54313632. Its totient is φ = 54068092.

The previous prime is 54190847. The next prime is 54190933. The reversal of 54190861 is 16809145.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16809145 = 5 ⋅3361829.

It is a cyclic number.

It is not a de Polignac number, because 54190861 - 2²¹ = 52093709 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 (54190811) 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, 60721 + ... + 61606.

It is an arithmetic number, because the mean of its divisors is an integer number (13578408).

Almost surely, 2^54190861 is an apocalyptic number.

It is an amenable number.

54190861 is a deficient number, since it is larger than the sum of its proper divisors (122771).

54190861 is a wasteful number, since it uses less digits than its factorization.

54190861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122770.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 54190861 is about 7361.4442197167. Note that the first 3 decimals coincide. The cubic root of 54190861 is about 378.4211057758.

The spelling of 54190861 in words is "fifty-four million, one hundred ninety thousand, eight hundred sixty-one".