1278772023 has 8 divisors (see below), whose sum is σ = 1763823600. Its totient is φ = 823117568.

The previous prime is 1278772003. The next prime is 1278772043. The reversal of 1278772023 is 3202778721.

It is an interprime number because it is at equal distance from previous prime (1278772003) and next prime (1278772043).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1278772023 - 2⁹ = 1278771511 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1278772003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7349178 + ... + 7349351.

It is an arithmetic number, because the mean of its divisors is an integer number (220477950).

Almost surely, 2^1278772023 is an apocalyptic number.

1278772023 is a deficient number, since it is larger than the sum of its proper divisors (485051577).

1278772023 is a wasteful number, since it uses less digits than its factorization.

1278772023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14698561.

The product of its (nonzero) digits is 65856, while the sum is 39.

The square root of 1278772023 is about 35759.9220217271. The cubic root of 1278772023 is about 1085.4197227949.

The spelling of 1278772023 in words is "one billion, two hundred seventy-eight million, seven hundred seventy-two thousand, twenty-three".