8438503997 has 16 divisors (see below), whose sum is σ = 10765404672. Its totient is φ = 6422537520.

The previous prime is 8438503987. The next prime is 8438504111. The reversal of 8438503997 is 7993058348.

It is not a de Polignac number, because 8438503997 - 2⁶ = 8438503933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8438503967) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1271003 + ... + 1277624.

It is an arithmetic number, because the mean of its divisors is an integer number (672837792).

Almost surely, 2^8438503997 is an apocalyptic number.

It is an amenable number.

8438503997 is a deficient number, since it is larger than the sum of its proper divisors (2326900675).

8438503997 is a wasteful number, since it uses less digits than its factorization.

8438503997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2548688.

The product of its (nonzero) digits is 6531840, while the sum is 56.

The square root of 8438503997 is about 91861.3302592554. The cubic root of 8438503997 is about 2035.8939578997.

The spelling of 8438503997 in words is "eight billion, four hundred thirty-eight million, five hundred three thousand, nine hundred ninety-seven".