961399 has 2 divisors, whose sum is σ = 961400. Its totient is φ = 961398.

The previous prime is 961397. The next prime is 961427. The reversal of 961399 is 993169.

It is a weak prime.

It is an emirp because it is prime and its reverse (993169) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 961399 - 2¹ = 961397 is a prime.

Together with 961397, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (961393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 480699 + 480700.

It is an arithmetic number, because the mean of its divisors is an integer number (480700).

2⁹⁶¹³⁹⁹ is an apocalyptic number.

961399 is a deficient number, since it is larger than the sum of its proper divisors (1).

961399 is an equidigital number, since it uses as much as digits as its factorization.

961399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13122, while the sum is 37.

The square root of 961399 is about 980.5095614016. The cubic root of 961399 is about 98.6963795850.

The spelling of 961399 in words is "nine hundred sixty-one thousand, three hundred ninety-nine".