247623670993 has 2 divisors, whose sum is σ = 247623670994. Its totient is φ = 247623670992.

The previous prime is 247623670979. The next prime is 247623670999. The reversal of 247623670993 is 399076326742.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 211460183104 + 36163487889 = 459848^2 + 190167^2 .

It is a cyclic number.

It is not a de Polignac number, because 247623670993 - 2¹⁷ = 247623539921 is a prime.

It is a super-2 number, since 2×247623670993² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (247623670999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123811835496 + 123811835497.

It is an arithmetic number, because the mean of its divisors is an integer number (123811835497).

Almost surely, 2^247623670993 is an apocalyptic number.

It is an amenable number.

247623670993 is a deficient number, since it is larger than the sum of its proper divisors (1).

247623670993 is an equidigital number, since it uses as much as digits as its factorization.

247623670993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20575296, while the sum is 58.

The spelling of 247623670993 in words is "two hundred forty-seven billion, six hundred twenty-three million, six hundred seventy thousand, nine hundred ninety-three".