505739397 has 8 divisors (see below), whose sum is σ = 709809760. Its totient is φ = 319414320.

The previous prime is 505739393. The next prime is 505739413. The reversal of 505739397 is 793937505.

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

It is not a de Polignac number, because 505739397 - 2² = 505739393 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 (505739393) 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, 4436254 + ... + 4436367.

It is an arithmetic number, because the mean of its divisors is an integer number (88726220).

Almost surely, 2^505739397 is an apocalyptic number.

505739397 is a gapful number since it is divisible by the number (57) formed by its first and last digit.

It is an amenable number.

505739397 is a deficient number, since it is larger than the sum of its proper divisors (204070363).

505739397 is a wasteful number, since it uses less digits than its factorization.

505739397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8872643.

The product of its (nonzero) digits is 893025, while the sum is 48.

The square root of 505739397 is about 22488.6504041483. The cubic root of 505739397 is about 796.7258877875.

The spelling of 505739397 in words is "five hundred five million, seven hundred thirty-nine thousand, three hundred ninety-seven".