505616397 has 48 divisors (see below), whose sum is σ = 843369408. Its totient is φ = 266173440.

The previous prime is 505616357. The next prime is 505616399. The reversal of 505616397 is 793616505.

It is a happy number.

It is not a de Polignac number, because 505616397 - 2⁶ = 505616333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505616399) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 92143 + ... + 97475.

It is an arithmetic number, because the mean of its divisors is an integer number (17570196).

Almost surely, 2^505616397 is an apocalyptic number.

It is an amenable number.

505616397 is a deficient number, since it is larger than the sum of its proper divisors (337753011).

505616397 is a wasteful number, since it uses less digits than its factorization.

505616397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5390 (or 5377 counting only the distinct ones).

The product of its (nonzero) digits is 170100, while the sum is 42.

The square root of 505616397 is about 22485.9155250570. The cubic root of 505616397 is about 796.6612924442.

The spelling of 505616397 in words is "five hundred five million, six hundred sixteen thousand, three hundred ninety-seven".