49172794987 has 2 divisors, whose sum is σ = 49172794988. Its totient is φ = 49172794986.

The previous prime is 49172794939. The next prime is 49172795003. The reversal of 49172794987 is 78949727194.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49172794987 is a prime.

It is not a weakly prime, because it can be changed into another prime (49172794907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24586397493 + 24586397494.

It is an arithmetic number, because the mean of its divisors is an integer number (24586397494).

Almost surely, 2^49172794987 is an apocalyptic number.

49172794987 is a deficient number, since it is larger than the sum of its proper divisors (1).

49172794987 is an equidigital number, since it uses as much as digits as its factorization.

49172794987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64012032, while the sum is 67.

The spelling of 49172794987 in words is "forty-nine billion, one hundred seventy-two million, seven hundred ninety-four thousand, nine hundred eighty-seven".