399601503 has 24 divisors (see below), whose sum is σ = 672111648. Its totient is φ = 224033472.

The previous prime is 399601487. The next prime is 399601523. The reversal of 399601503 is 305106993.

399601503 is a `hidden beast` number, since 3 + 99 + 60 + 1 + 503 = 666.

It is not a de Polignac number, because 399601503 - 2⁴ = 399601487 is a prime.

It is a super-2 number, since 2×399601503² = 319362722399718018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399601523) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56500 + ... + 63177.

It is an arithmetic number, because the mean of its divisors is an integer number (28004652).

Almost surely, 2^399601503 is an apocalyptic number.

399601503 is a deficient number, since it is larger than the sum of its proper divisors (272510145).

399601503 is a wasteful number, since it uses less digits than its factorization.

399601503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119743 (or 119740 counting only the distinct ones).

The product of its (nonzero) digits is 21870, while the sum is 36.

The square root of 399601503 is about 19990.0350925155. The cubic root of 399601503 is about 736.5615391798.

The spelling of 399601503 in words is "three hundred ninety-nine million, six hundred one thousand, five hundred three".