7881953 has 4 divisors (see below), whose sum is σ = 7893780. Its totient is φ = 7870128.

The previous prime is 7881919. The next prime is 7881959. The reversal of 7881953 is 3591887.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 954529 + 6927424 = 977^2 + 2632^2 .

It is a cyclic number.

It is not a de Polignac number, because 7881953 - 2⁶ = 7881889 is a prime.

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 7881953.

It is not an unprimeable number, because it can be changed into a prime (7881959) 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, 4850 + ... + 6267.

It is an arithmetic number, because the mean of its divisors is an integer number (1973445).

Almost surely, 2^7881953 is an apocalyptic number.

It is an amenable number.

7881953 is a deficient number, since it is larger than the sum of its proper divisors (11827).

7881953 is a wasteful number, since it uses less digits than its factorization.

7881953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11826.

The product of its digits is 60480, while the sum is 41.

The square root of 7881953 is about 2807.4816116940. The cubic root of 7881953 is about 199.0113963659.

The spelling of 7881953 in words is "seven million, eight hundred eighty-one thousand, nine hundred fifty-three".