77013947 has 4 divisors (see below), whose sum is σ = 77036736. Its totient is φ = 76991160.

The previous prime is 77013941. The next prime is 77013953. The reversal of 77013947 is 74931077.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74931077 = 13 ⋅5763929.

It is an interprime number because it is at equal distance from previous prime (77013941) and next prime (77013953).

It is a cyclic number.

It is not a de Polignac number, because 77013947 - 2¹² = 77009851 is a prime.

It is a super-2 number, since 2×77013947² = 11862296065037618, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 77013947.

It is not an unprimeable number, because it can be changed into a prime (77013941) 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, 5204 + ... + 13457.

It is an arithmetic number, because the mean of its divisors is an integer number (19259184).

Almost surely, 2^77013947 is an apocalyptic number.

77013947 is a deficient number, since it is larger than the sum of its proper divisors (22789).

77013947 is a wasteful number, since it uses less digits than its factorization.

77013947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22788.

The product of its (nonzero) digits is 37044, while the sum is 38.

The square root of 77013947 is about 8775.7590554892. The cubic root of 77013947 is about 425.4577711137.

The spelling of 77013947 in words is "seventy-seven million, thirteen thousand, nine hundred forty-seven".