768994251 has 4 divisors (see below), whose sum is σ = 1025325672. Its totient is φ = 512662832.

The previous prime is 768994249. The next prime is 768994279. The reversal of 768994251 is 152499867.

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

It is a cyclic number.

It is not a de Polignac number, because 768994251 - 2¹ = 768994249 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 768994194 and 768994203.

It is not an unprimeable number, because it can be changed into a prime (768994151) 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, 128165706 + ... + 128165711.

It is an arithmetic number, because the mean of its divisors is an integer number (256331418).

Almost surely, 2^768994251 is an apocalyptic number.

768994251 is a deficient number, since it is larger than the sum of its proper divisors (256331421).

768994251 is a wasteful number, since it uses less digits than its factorization.

768994251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256331420.

The product of its digits is 1088640, while the sum is 51.

The square root of 768994251 is about 27730.7455904092. The cubic root of 768994251 is about 916.1664087967.

The spelling of 768994251 in words is "seven hundred sixty-eight million, nine hundred ninety-four thousand, two hundred fifty-one".