1634225971 has 4 divisors (see below), whose sum is σ = 1867686832. Its totient is φ = 1400765112.

The previous prime is 1634225947. The next prime is 1634225993. The reversal of 1634225971 is 1795224361.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1634225971 - 2²⁹ = 1097355059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1634225471) 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, 116730420 + ... + 116730433.

It is an arithmetic number, because the mean of its divisors is an integer number (466921708).

Almost surely, 2^1634225971 is an apocalyptic number.

1634225971 is a deficient number, since it is larger than the sum of its proper divisors (233460861).

1634225971 is an equidigital number, since it uses as much as digits as its factorization.

1634225971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233460860.

The product of its digits is 90720, while the sum is 40.

The square root of 1634225971 is about 40425.5608619101. The cubic root of 1634225971 is about 1177.8881048697. Note that the first 3 decimals are identical.

The spelling of 1634225971 in words is "one billion, six hundred thirty-four million, two hundred twenty-five thousand, nine hundred seventy-one".