703991997 has 6 divisors (see below), whose sum is σ = 1016877342. Its totient is φ = 469327992.

The previous prime is 703991993. The next prime is 703992013. The reversal of 703991997 is 799199307.

It can be written as a sum of positive squares in only one way, i.e., 687173796 + 16818201 = 26214^2 + 4101^2 .

It is not a de Polignac number, because 703991997 - 2² = 703991993 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (703991993) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 39110658 + ... + 39110675.

It is an arithmetic number, because the mean of its divisors is an integer number (169479557).

Almost surely, 2^703991997 is an apocalyptic number.

It is an amenable number.

703991997 is a deficient number, since it is larger than the sum of its proper divisors (312885345).

703991997 is a wasteful number, since it uses less digits than its factorization.

703991997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78221339 (or 78221336 counting only the distinct ones).

The product of its (nonzero) digits is 964467, while the sum is 54.

The square root of 703991997 is about 26532.8475102089. The cubic root of 703991997 is about 889.5886652845.

The spelling of 703991997 in words is "seven hundred three million, nine hundred ninety-one thousand, nine hundred ninety-seven".