787916551 has 2 divisors, whose sum is σ = 787916552. Its totient is φ = 787916550.

The previous prime is 787916513. The next prime is 787916587. The reversal of 787916551 is 155619787.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 787916551 - 2¹⁵ = 787883783 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 787916495 and 787916504.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (787916501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 393958275 + 393958276.

It is an arithmetic number, because the mean of its divisors is an integer number (393958276).

Almost surely, 2^787916551 is an apocalyptic number.

787916551 is a deficient number, since it is larger than the sum of its proper divisors (1).

787916551 is an equidigital number, since it uses as much as digits as its factorization.

787916551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 529200, while the sum is 49.

The square root of 787916551 is about 28069.8512821141. The cubic root of 787916551 is about 923.6201685739.

The spelling of 787916551 in words is "seven hundred eighty-seven million, nine hundred sixteen thousand, five hundred fifty-one".