705721994 has 16 divisors (see below), whose sum is σ = 1066175136. Its totient is φ = 350338800.

The previous prime is 705721957. The next prime is 705722009. The reversal of 705721994 is 499127507.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195284 + ... + 198864.

It is an arithmetic number, because the mean of its divisors is an integer number (66635946).

Almost surely, 2^705721994 is an apocalyptic number.

705721994 is a deficient number, since it is larger than the sum of its proper divisors (360453142).

705721994 is a wasteful number, since it uses less digits than its factorization.

705721994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4261.

The product of its (nonzero) digits is 158760, while the sum is 44.

The square root of 705721994 is about 26565.4285491501. The cubic root of 705721994 is about 890.3167639027.

The spelling of 705721994 in words is "seven hundred five million, seven hundred twenty-one thousand, nine hundred ninety-four".