761904649 has 4 divisors (see below), whose sum is σ = 831168720. Its totient is φ = 692640580.

The previous prime is 761904643. The next prime is 761904673. The reversal of 761904649 is 946409167.

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: 946409167 = 11 ⋅86037197.

It is a cyclic number.

It is not a de Polignac number, because 761904649 - 2¹¹ = 761902601 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 761904599 and 761904608.

It is not an unprimeable number, because it can be changed into a prime (761904643) 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, 34632019 + ... + 34632040.

It is an arithmetic number, because the mean of its divisors is an integer number (207792180).

Almost surely, 2^761904649 is an apocalyptic number.

It is an amenable number.

761904649 is a deficient number, since it is larger than the sum of its proper divisors (69264071).

761904649 is a wasteful number, since it uses less digits than its factorization.

761904649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69264070.

The product of its (nonzero) digits is 326592, while the sum is 46.

The square root of 761904649 is about 27602.6203285123. The cubic root of 761904649 is about 913.3422356773.

The spelling of 761904649 in words is "seven hundred sixty-one million, nine hundred four thousand, six hundred forty-nine".