405379549 has 4 divisors (see below), whose sum is σ = 405512640. Its totient is φ = 405246460.

The previous prime is 405379543. The next prime is 405379561. The reversal of 405379549 is 945973504.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 405379549 - 2¹¹ = 405377501 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 405379499 and 405379508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405379543) 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, 61867 + ... + 68104.

It is an arithmetic number, because the mean of its divisors is an integer number (101378160).

Almost surely, 2^405379549 is an apocalyptic number.

It is an amenable number.

405379549 is a deficient number, since it is larger than the sum of its proper divisors (133091).

405379549 is a wasteful number, since it uses less digits than its factorization.

405379549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133090.

The product of its (nonzero) digits is 680400, while the sum is 46.

The square root of 405379549 is about 20134.0395599095. The cubic root of 405379549 is about 740.0946731807.

It can be divided in two parts, 40537 and 9549, that added together give a triangular number (50086 = T₃₁₆).

The spelling of 405379549 in words is "four hundred five million, three hundred seventy-nine thousand, five hundred forty-nine".