781250000093 has 4 divisors (see below), whose sum is σ = 782937365568. Its totient is φ = 779562634620.

The previous prime is 781250000087. The next prime is 781250000099. The reversal of 781250000093 is 390000052187.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (781250000087) and next prime (781250000099).

It is a cyclic number.

It is not a de Polignac number, because 781250000093 - 2⁶ = 781250000029 is a prime.

It is a super-2 number, since 2×781250000093² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (781250000099) 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, 843682043 + ... + 843682968.

It is an arithmetic number, because the mean of its divisors is an integer number (195734341392).

Almost surely, 2^781250000093 is an apocalyptic number.

It is an amenable number.

781250000093 is a deficient number, since it is larger than the sum of its proper divisors (1687365475).

781250000093 is a wasteful number, since it uses less digits than its factorization.

781250000093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1687365474.

The product of its (nonzero) digits is 15120, while the sum is 35.

The spelling of 781250000093 in words is "seven hundred eighty-one billion, two hundred fifty million, ninety-three", and thus it is an aban number.