708721427 has 2 divisors, whose sum is σ = 708721428. Its totient is φ = 708721426.

The previous prime is 708721309. The next prime is 708721439. The reversal of 708721427 is 724127807.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 708721427 - 2⁸ = 708721171 is a prime.

It is a super-2 number, since 2×708721427² = 1004572122177832658, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (708721457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 354360713 + 354360714.

It is an arithmetic number, because the mean of its divisors is an integer number (354360714).

Almost surely, 2^708721427 is an apocalyptic number.

708721427 is a deficient number, since it is larger than the sum of its proper divisors (1).

708721427 is an equidigital number, since it uses as much as digits as its factorization.

708721427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43904, while the sum is 38.

The square root of 708721427 is about 26621.8223831503. The cubic root of 708721427 is about 891.5763114002.

The spelling of 708721427 in words is "seven hundred eight million, seven hundred twenty-one thousand, four hundred twenty-seven".