71620129 has 8 divisors (see below), whose sum is σ = 82617408. Its totient is φ = 60814320.

The previous prime is 71620117. The next prime is 71620147. The reversal of 71620129 is 92102617.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 71620129 - 2⁷ = 71620001 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71620097 and 71620106.

It is not an unprimeable number, because it can be changed into a prime (71620429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47062 + ... + 48559.

It is an arithmetic number, because the mean of its divisors is an integer number (10327176).

Almost surely, 2^71620129 is an apocalyptic number.

It is an amenable number.

71620129 is a deficient number, since it is larger than the sum of its proper divisors (10997279).

71620129 is a wasteful number, since it uses less digits than its factorization.

71620129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95735.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 71620129 is about 8462.8676581877. The cubic root of 71620129 is about 415.2838412399.

The spelling of 71620129 in words is "seventy-one million, six hundred twenty thousand, one hundred twenty-nine".