68153629 has 4 divisors (see below), whose sum is σ = 72162684. Its totient is φ = 64144576.

The previous prime is 68153611. The next prime is 68153641. The reversal of 68153629 is 92635186.

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 40832100 + 27321529 = 6390^2 + 5227^2 .

It is a cyclic number.

It is not a de Polignac number, because 68153629 - 2⁵ = 68153597 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68153591 and 68153600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68153609) 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, 2004502 + ... + 2004535.

It is an arithmetic number, because the mean of its divisors is an integer number (18040671).

Almost surely, 2^68153629 is an apocalyptic number.

It is an amenable number.

68153629 is a deficient number, since it is larger than the sum of its proper divisors (4009055).

68153629 is a wasteful number, since it uses less digits than its factorization.

68153629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4009054.

The product of its digits is 77760, while the sum is 40.

The square root of 68153629 is about 8255.5211222551. The cubic root of 68153629 is about 408.4726616401.

The spelling of 68153629 in words is "sixty-eight million, one hundred fifty-three thousand, six hundred twenty-nine".