1771730961 has 64 divisors (see below), whose sum is σ = 3181172736. Its totient is φ = 847065600.

The previous prime is 1771730953. The next prime is 1771730969. The reversal of 1771730961 is 1690371771.

It is an interprime number because it is at equal distance from previous prime (1771730953) and next prime (1771730969).

It is not a de Polignac number, because 1771730961 - 2³ = 1771730953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1771730969) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1371726 + ... + 1373016.

It is an arithmetic number, because the mean of its divisors is an integer number (49705824).

Almost surely, 2^1771730961 is an apocalyptic number.

1771730961 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1771730961 is a deficient number, since it is larger than the sum of its proper divisors (1409441775).

1771730961 is a wasteful number, since it uses less digits than its factorization.

1771730961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1782.

The product of its (nonzero) digits is 55566, while the sum is 42.

The square root of 1771730961 is about 42091.9346312331. The cubic root of 1771730961 is about 1210.0386939792.

The spelling of 1771730961 in words is "one billion, seven hundred seventy-one million, seven hundred thirty thousand, nine hundred sixty-one".