78462949 has 4 divisors (see below), whose sum is σ = 79943436. Its totient is φ = 76982464.

The previous prime is 78462947. The next prime is 78463001. The reversal of 78462949 is 94926487.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94926487 = 17 ⋅5583911.

It can be written as a sum of positive squares in 2 ways, for example, as 39150049 + 39312900 = 6257^2 + 6270^2 .

It is a cyclic number.

It is not a de Polignac number, because 78462949 - 2¹ = 78462947 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 (78462941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 740164 + ... + 740269.

It is an arithmetic number, because the mean of its divisors is an integer number (19985859).

Almost surely, 2^78462949 is an apocalyptic number.

It is an amenable number.

78462949 is a deficient number, since it is larger than the sum of its proper divisors (1480487).

78462949 is a wasteful number, since it uses less digits than its factorization.

78462949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1480486.

The product of its digits is 870912, while the sum is 49.

The square root of 78462949 is about 8857.9314176618. The cubic root of 78462949 is about 428.1095102926.

The spelling of 78462949 in words is "seventy-eight million, four hundred sixty-two thousand, nine hundred forty-nine".