503401387 has 4 divisors (see below), whose sum is σ = 515108440. Its totient is φ = 491694336.

The previous prime is 503401373. The next prime is 503401411. The reversal of 503401387 is 783104305.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 503401387 - 2¹⁹ = 502877099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (503401307) 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, 5853462 + ... + 5853547.

It is an arithmetic number, because the mean of its divisors is an integer number (128777110).

Almost surely, 2^503401387 is an apocalyptic number.

503401387 is a deficient number, since it is larger than the sum of its proper divisors (11707053).

503401387 is a wasteful number, since it uses less digits than its factorization.

503401387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11707052.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 503401387 is about 22436.6081884049. The cubic root of 503401387 is about 795.4962485879.

The spelling of 503401387 in words is "five hundred three million, four hundred one thousand, three hundred eighty-seven".