761720427 has 24 divisors (see below), whose sum is σ = 1213806048. Its totient is φ = 457315200.

The previous prime is 761720413. The next prime is 761720489. The reversal of 761720427 is 724027167.

It is a happy number.

It is not a de Polignac number, because 761720427 - 2⁶ = 761720363 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 761720391 and 761720400.

It is not an unprimeable number, because it can be changed into a prime (761720527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 74599 + ... + 84192.

It is an arithmetic number, because the mean of its divisors is an integer number (50575252).

Almost surely, 2^761720427 is an apocalyptic number.

761720427 is a deficient number, since it is larger than the sum of its proper divisors (452085621).

761720427 is a wasteful number, since it uses less digits than its factorization.

761720427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158851 (or 158848 counting only the distinct ones).

The product of its (nonzero) digits is 32928, while the sum is 36.

The square root of 761720427 is about 27599.2830885152. The cubic root of 761720427 is about 913.2686169743.

The spelling of 761720427 in words is "seven hundred sixty-one million, seven hundred twenty thousand, four hundred twenty-seven".