71620453 has 4 divisors (see below), whose sum is σ = 71827200. Its totient is φ = 71413708.

The previous prime is 71620441. The next prime is 71620463. The reversal of 71620453 is 35402617.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71620453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71620403) 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, 102853 + ... + 103546.

It is an arithmetic number, because the mean of its divisors is an integer number (17956800).

Almost surely, 2^71620453 is an apocalyptic number.

It is an amenable number.

71620453 is a deficient number, since it is larger than the sum of its proper divisors (206747).

71620453 is a wasteful number, since it uses less digits than its factorization.

71620453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206746.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 71620453 is about 8462.8868006136. The cubic root of 71620453 is about 415.2844674687.

The spelling of 71620453 in words is "seventy-one million, six hundred twenty thousand, four hundred fifty-three".