78049954 has 4 divisors (see below), whose sum is σ = 117074934. Its totient is φ = 39024976.

The previous prime is 78049949. The next prime is 78049957. The reversal of 78049954 is 45994087.

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

It can be written as a sum of positive squares in only one way, i.e., 42968025 + 35081929 = 6555^2 + 5923^2 .

It is a super-3 number, since 3×78049954³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (78049957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19512487 + ... + 19512490.

Almost surely, 2^78049954 is an apocalyptic number.

78049954 is a deficient number, since it is larger than the sum of its proper divisors (39024980).

78049954 is a wasteful number, since it uses less digits than its factorization.

78049954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39024979.

The product of its (nonzero) digits is 362880, while the sum is 46.

The square root of 78049954 is about 8834.5885020186. The cubic root of 78049954 is about 427.3570608381.

It can be divided in two parts, 78049 and 954, that added together give a triangular number (79003 = T₃₉₇).

The spelling of 78049954 in words is "seventy-eight million, forty-nine thousand, nine hundred fifty-four".