49078321 has 4 divisors (see below), whose sum is σ = 49224292. Its totient is φ = 48932352.

The previous prime is 49078307. The next prime is 49078327. The reversal of 49078321 is 12387094.

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 7617600 + 41460721 = 2760^2 + 6439^2 .

It is a cyclic number.

It is not a de Polignac number, because 49078321 - 2⁷ = 49078193 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49078327) 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, 72480 + ... + 73153.

It is an arithmetic number, because the mean of its divisors is an integer number (12306073).

Almost surely, 2^49078321 is an apocalyptic number.

It is an amenable number.

49078321 is a deficient number, since it is larger than the sum of its proper divisors (145971).

49078321 is a wasteful number, since it uses less digits than its factorization.

49078321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145970.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 49078321 is about 7005.5921234397. The cubic root of 49078321 is about 366.1254335318.

The spelling of 49078321 in words is "forty-nine million, seventy-eight thousand, three hundred twenty-one".