631942153 has 4 divisors (see below), whose sum is σ = 638199108. Its totient is φ = 625685200.

The previous prime is 631942121. The next prime is 631942169. The reversal of 631942153 is 351249136.

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 424236409 + 207705744 = 20597^2 + 14412^2 .

It is a cyclic number.

It is not a de Polignac number, because 631942153 - 2⁵ = 631942121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (631922153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3128326 + ... + 3128527.

It is an arithmetic number, because the mean of its divisors is an integer number (159549777).

Almost surely, 2^631942153 is an apocalyptic number.

It is an amenable number.

631942153 is a deficient number, since it is larger than the sum of its proper divisors (6256955).

631942153 is a wasteful number, since it uses less digits than its factorization.

631942153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6256954.

The product of its digits is 19440, while the sum is 34.

The square root of 631942153 is about 25138.4596385697. The cubic root of 631942153 is about 858.1419018800.

The spelling of 631942153 in words is "six hundred thirty-one million, nine hundred forty-two thousand, one hundred fifty-three".