629281145 has 4 divisors (see below), whose sum is σ = 755137380. Its totient is φ = 503424912.

The previous prime is 629281139. The next prime is 629281151. The reversal of 629281145 is 541182926.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 541182926 = 2 ⋅270591463.

It is an interprime number because it is at equal distance from previous prime (629281139) and next prime (629281151).

It can be written as a sum of positive squares in 2 ways, for example, as 350925289 + 278355856 = 18733^2 + 16684^2 .

It is a cyclic number.

It is not a de Polignac number, because 629281145 - 2¹⁰ = 629280121 is a prime.

It is a super-2 number, since 2×629281145² = 791989518905022050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 629281099 and 629281108.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62928110 + ... + 62928119.

It is an arithmetic number, because the mean of its divisors is an integer number (188784345).

Almost surely, 2^629281145 is an apocalyptic number.

It is an amenable number.

629281145 is a deficient number, since it is larger than the sum of its proper divisors (125856235).

629281145 is a wasteful number, since it uses less digits than its factorization.

629281145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125856234.

The product of its digits is 34560, while the sum is 38.

The square root of 629281145 is about 25085.4767744207. The cubic root of 629281145 is about 856.9357075272.

The spelling of 629281145 in words is "six hundred twenty-nine million, two hundred eighty-one thousand, one hundred forty-five".