709661531 has 2 divisors, whose sum is σ = 709661532. Its totient is φ = 709661530.

The previous prime is 709661489. The next prime is 709661539. The reversal of 709661531 is 135166907.

709661531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 709661531 - 2²⁶ = 642552667 is a prime.

It is a super-2 number, since 2×709661531² = 1007238977162527922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (709661539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 354830765 + 354830766.

It is an arithmetic number, because the mean of its divisors is an integer number (354830766).

Almost surely, 2^709661531 is an apocalyptic number.

709661531 is a deficient number, since it is larger than the sum of its proper divisors (1).

709661531 is an equidigital number, since it uses as much as digits as its factorization.

709661531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 709661531 is about 26639.4731742202. The cubic root of 709661531 is about 891.9703562678.

The spelling of 709661531 in words is "seven hundred nine million, six hundred sixty-one thousand, five hundred thirty-one".