787049621 has 4 divisors (see below), whose sum is σ = 787340544. Its totient is φ = 786758700.

The previous prime is 787049617. The next prime is 787049657. The reversal of 787049621 is 126940787.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 126940787 = 239 ⋅531133.

It is a cyclic number.

It is not a de Polignac number, because 787049621 - 2² = 787049617 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (787049611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141365 + ... + 146826.

It is an arithmetic number, because the mean of its divisors is an integer number (196835136).

Almost surely, 2^787049621 is an apocalyptic number.

It is an amenable number.

787049621 is a deficient number, since it is larger than the sum of its proper divisors (290923).

787049621 is a wasteful number, since it uses less digits than its factorization.

787049621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290922.

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

The square root of 787049621 is about 28054.4046630828. The cubic root of 787049621 is about 923.2812968657.

The spelling of 787049621 in words is "seven hundred eighty-seven million, forty-nine thousand, six hundred twenty-one".