54158749 has 4 divisors (see below), whose sum is σ = 54185436. Its totient is φ = 54132064.

The previous prime is 54158737. The next prime is 54158803. The reversal of 54158749 is 94785145.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 49984900 + 4173849 = 7070^2 + 2043^2 .

It is a cyclic number.

It is not a de Polignac number, because 54158749 - 2¹¹ = 54156701 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 (54150749) 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, 10024 + ... + 14449.

It is an arithmetic number, because the mean of its divisors is an integer number (13546359).

Almost surely, 2^54158749 is an apocalyptic number.

It is an amenable number.

54158749 is a deficient number, since it is larger than the sum of its proper divisors (26687).

54158749 is a wasteful number, since it uses less digits than its factorization.

54158749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26686.

The product of its digits is 201600, while the sum is 43.

The square root of 54158749 is about 7359.2628027541. The cubic root of 54158749 is about 378.3463437256.

The spelling of 54158749 in words is "fifty-four million, one hundred fifty-eight thousand, seven hundred forty-nine".