1720796767 has 4 divisors (see below), whose sum is σ = 1720933056. Its totient is φ = 1720660480.

The previous prime is 1720796761. The next prime is 1720796783. The reversal of 1720796767 is 7676970271.

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

It is a cyclic number.

It is not a de Polignac number, because 1720796767 - 2¹⁵ = 1720763999 is a prime.

It is a super-2 number, since 2×1720796767² = 5922283026635304578, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1720796761) 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, 47023 + ... + 75184.

It is an arithmetic number, because the mean of its divisors is an integer number (430233264).

Almost surely, 2^1720796767 is an apocalyptic number.

1720796767 is a deficient number, since it is larger than the sum of its proper divisors (136289).

1720796767 is a wasteful number, since it uses less digits than its factorization.

1720796767 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136288.

The product of its (nonzero) digits is 1555848, while the sum is 52.

The square root of 1720796767 is about 41482.4874736316. The cubic root of 1720796767 is about 1198.3302626790.

The spelling of 1720796767 in words is "one billion, seven hundred twenty million, seven hundred ninety-six thousand, seven hundred sixty-seven".