63148587973 has 4 divisors (see below), whose sum is σ = 63149794540. Its totient is φ = 63147381408.

The previous prime is 63148587947. The next prime is 63148587989. The reversal of 63148587973 is 37978584136.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14839625124 + 48308962849 = 121818^2 + 219793^2 .

It is a cyclic number.

It is not a de Polignac number, because 63148587973 - 2¹⁷ = 63148456901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63148587373) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 521040 + ... + 630697.

It is an arithmetic number, because the mean of its divisors is an integer number (15787448635).

Almost surely, 2^63148587973 is an apocalyptic number.

It is an amenable number.

63148587973 is a deficient number, since it is larger than the sum of its proper divisors (1206567).

63148587973 is a wasteful number, since it uses less digits than its factorization.

63148587973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1206566.

The product of its digits is 30481920, while the sum is 61.

The spelling of 63148587973 in words is "sixty-three billion, one hundred forty-eight million, five hundred eighty-seven thousand, nine hundred seventy-three".