7725994 has 4 divisors (see below), whose sum is σ = 11588994. Its totient is φ = 3862996.

The previous prime is 7725967. The next prime is 7725997. The reversal of 7725994 is 4995277.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4995277 = 7 ⋅713611.

It can be written as a sum of positive squares in only one way, i.e., 7535025 + 190969 = 2745^2 + 437^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 7725994.

It is not an unprimeable number, because it can be changed into a prime (7725997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1931497 + ... + 1931500.

Almost surely, 2^7725994 is an apocalyptic number.

7725994 is a deficient number, since it is larger than the sum of its proper divisors (3863000).

7725994 is a wasteful number, since it uses less digits than its factorization.

7725994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3862999.

The product of its digits is 158760, while the sum is 43.

The square root of 7725994 is about 2779.5672325022. The cubic root of 7725994 is about 197.6900398007.

The spelling of 7725994 in words is "seven million, seven hundred twenty-five thousand, nine hundred ninety-four".