961921453 has 2 divisors, whose sum is σ = 961921454. Its totient is φ = 961921452.

The previous prime is 961921447. The next prime is 961921469. The reversal of 961921453 is 354129169.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 961124004 + 797449 = 31002^2 + 893^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-961921453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (961921483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 480960726 + 480960727.

It is an arithmetic number, because the mean of its divisors is an integer number (480960727).

Almost surely, 2^961921453 is an apocalyptic number.

It is an amenable number.

961921453 is a deficient number, since it is larger than the sum of its proper divisors (1).

961921453 is an equidigital number, since it uses as much as digits as its factorization.

961921453 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58320, while the sum is 40.

The square root of 961921453 is about 31014.8585842335. The cubic root of 961921453 is about 987.1425453667.

The spelling of 961921453 in words is "nine hundred sixty-one million, nine hundred twenty-one thousand, four hundred fifty-three".