78892947 has 40 divisors (see below), whose sum is σ = 136956512. Its totient is φ = 44323200.

The previous prime is 78892943. The next prime is 78892951. The reversal of 78892947 is 74929887.

It is an interprime number because it is at equal distance from previous prime (78892943) and next prime (78892951).

It is not a de Polignac number, because 78892947 - 2² = 78892943 is a prime.

Its product of digits (2032128) is a multiple of the sum of its prime divisors (2352).

It is a junction number, because it is equal to n+sod(n) for n = 78892893 and 78892902.

It is not an unprimeable number, because it can be changed into a prime (78892943) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 33447 + ... + 35727.

Almost surely, 2^78892947 is an apocalyptic number.

78892947 is a deficient number, since it is larger than the sum of its proper divisors (58063565).

78892947 is a wasteful number, since it uses less digits than its factorization.

78892947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2361 (or 2352 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 54.

The square root of 78892947 is about 8882.1701740059. The cubic root of 78892947 is about 428.8901376461.

It can be divided in two parts, 78 and 892947, that added together give a square (893025 = 945²).

The spelling of 78892947 in words is "seventy-eight million, eight hundred ninety-two thousand, nine hundred forty-seven".