693961 has 2 divisors, whose sum is σ = 693962. Its totient is φ = 693960.

The previous prime is 693943. The next prime is 693967. The reversal of 693961 is 169396.

693961 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 can be written as a sum of positive squares in only one way, i.e., 518400 + 175561 = 720^2 + 419^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-693961 is a prime.

It is a nialpdrome in base 15.

It is not a weakly prime, because it can be changed into another prime (693967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 346980 + 346981.

It is an arithmetic number, because the mean of its divisors is an integer number (346981).

2⁶⁹³⁹⁶¹ is an apocalyptic number.

It is an amenable number.

693961 is a deficient number, since it is larger than the sum of its proper divisors (1).

693961 is an equidigital number, since it uses as much as digits as its factorization.

693961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8748, while the sum is 34.

The square root of 693961 is about 833.0432161659. The cubic root of 693961 is about 88.5343265395.

The spelling of 693961 in words is "six hundred ninety-three thousand, nine hundred sixty-one".