708145621 has 2 divisors, whose sum is σ = 708145622. Its totient is φ = 708145620.

The previous prime is 708145609. The next prime is 708145673. The reversal of 708145621 is 126541807.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 597264721 + 110880900 = 24439^2 + 10530^2 .

It is a cyclic number.

It is not a de Polignac number, because 708145621 - 2⁵ = 708145589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (708145601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 354072810 + 354072811.

It is an arithmetic number, because the mean of its divisors is an integer number (354072811).

Almost surely, 2^708145621 is an apocalyptic number.

It is an amenable number.

708145621 is a deficient number, since it is larger than the sum of its proper divisors (1).

708145621 is an equidigital number, since it uses as much as digits as its factorization.

708145621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 708145621 is about 26611.0056367662. The cubic root of 708145621 is about 891.3347900424.

The spelling of 708145621 in words is "seven hundred eight million, one hundred forty-five thousand, six hundred twenty-one".