991074607 has 2 divisors, whose sum is σ = 991074608. Its totient is φ = 991074606.

The previous prime is 991074593. The next prime is 991074611. The reversal of 991074607 is 706470199.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-991074607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (991074647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495537303 + 495537304.

It is an arithmetic number, because the mean of its divisors is an integer number (495537304).

Almost surely, 2^991074607 is an apocalyptic number.

991074607 is a deficient number, since it is larger than the sum of its proper divisors (1).

991074607 is an equidigital number, since it uses as much as digits as its factorization.

991074607 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 95256, while the sum is 43.

The square root of 991074607 is about 31481.3374398230. The cubic root of 991074607 is about 997.0159734425.

The spelling of 991074607 in words is "nine hundred ninety-one million, seventy-four thousand, six hundred seven".