787949531 has 2 divisors, whose sum is σ = 787949532. Its totient is φ = 787949530.

The previous prime is 787949509. The next prime is 787949557. The reversal of 787949531 is 135949787.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-787949531 is a prime.

It is a super-2 number, since 2×787949531² = 1241728926806239922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (787949131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 393974765 + 393974766.

It is an arithmetic number, because the mean of its divisors is an integer number (393974766).

Almost surely, 2^787949531 is an apocalyptic number.

787949531 is a deficient number, since it is larger than the sum of its proper divisors (1).

787949531 is an equidigital number, since it uses as much as digits as its factorization.

787949531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1905120, while the sum is 53.

The square root of 787949531 is about 28070.4387390009. The cubic root of 787949531 is about 923.6330551197.

The spelling of 787949531 in words is "seven hundred eighty-seven million, nine hundred forty-nine thousand, five hundred thirty-one".