961761623 has 2 divisors, whose sum is σ = 961761624. Its totient is φ = 961761622.

The previous prime is 961761601. The next prime is 961761727. The reversal of 961761623 is 326167169.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 961761623 - 2¹² = 961757527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (961761023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 480880811 + 480880812.

It is an arithmetic number, because the mean of its divisors is an integer number (480880812).

Almost surely, 2^961761623 is an apocalyptic number.

961761623 is a deficient number, since it is larger than the sum of its proper divisors (1).

961761623 is an equidigital number, since it uses as much as digits as its factorization.

961761623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 41.

The square root of 961761623 is about 31012.2818089866. The cubic root of 961761623 is about 987.0878687845.

The spelling of 961761623 in words is "nine hundred sixty-one million, seven hundred sixty-one thousand, six hundred twenty-three".