787861955 has 4 divisors (see below), whose sum is σ = 945434352. Its totient is φ = 630289560.

The previous prime is 787861951. The next prime is 787861969. The reversal of 787861955 is 559168787.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 559168787 = 439 ⋅1273733.

It is not a de Polignac number, because 787861955 - 2² = 787861951 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 787861955.

It is not an unprimeable number, because it can be changed into a prime (787861951) 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, 78786191 + ... + 78786200.

It is an arithmetic number, because the mean of its divisors is an integer number (236358588).

Almost surely, 2^787861955 is an apocalyptic number.

787861955 is a deficient number, since it is larger than the sum of its proper divisors (157572397).

787861955 is a wasteful number, since it uses less digits than its factorization.

787861955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157572396.

The product of its digits is 4233600, while the sum is 56.

The square root of 787861955 is about 28068.8787627864. The cubic root of 787861955 is about 923.5988350408.

The spelling of 787861955 in words is "seven hundred eighty-seven million, eight hundred sixty-one thousand, nine hundred fifty-five".