787049261 has 4 divisors (see below), whose sum is σ = 787830300. Its totient is φ = 786268224.

The previous prime is 787049257. The next prime is 787049269. The reversal of 787049261 is 162940787.

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

It can be written as a sum of positive squares in 2 ways, for example, as 342472036 + 444577225 = 18506^2 + 21085^2 .

It is a cyclic number.

It is not a de Polignac number, because 787049261 - 2² = 787049257 is a prime.

It is a super-2 number, since 2×787049261² = 1238893078481292242, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (787049269) 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, 389006 + ... + 391023.

It is an arithmetic number, because the mean of its divisors is an integer number (196957575).

Almost surely, 2^787049261 is an apocalyptic number.

It is an amenable number.

787049261 is a deficient number, since it is larger than the sum of its proper divisors (781039).

787049261 is a wasteful number, since it uses less digits than its factorization.

787049261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781038.

The product of its (nonzero) digits is 169344, while the sum is 44.

The square root of 787049261 is about 28054.3982469772. The cubic root of 787049261 is about 923.2811560947.

The spelling of 787049261 in words is "seven hundred eighty-seven million, forty-nine thousand, two hundred sixty-one".