961239787 has 2 divisors, whose sum is σ = 961239788. Its totient is φ = 961239786.

The previous prime is 961239757. The next prime is 961239791. The reversal of 961239787 is 787932169.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 961239787 - 2¹⁵ = 961207019 is a prime.

It is a super-2 number, since 2×961239787² = 1847963856223610738, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (961239757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 480619893 + 480619894.

It is an arithmetic number, because the mean of its divisors is an integer number (480619894).

Almost surely, 2^961239787 is an apocalyptic number.

961239787 is a deficient number, since it is larger than the sum of its proper divisors (1).

961239787 is an equidigital number, since it uses as much as digits as its factorization.

961239787 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1143072, while the sum is 52.

The square root of 961239787 is about 31003.8672910332. The cubic root of 961239787 is about 986.9093106185.

The spelling of 961239787 in words is "nine hundred sixty-one million, two hundred thirty-nine thousand, seven hundred eighty-seven".