67761431 has 4 divisors (see below), whose sum is σ = 67798872. Its totient is φ = 67723992.

The previous prime is 67761409. The next prime is 67761457. The reversal of 67761431 is 13416776.

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 67761431 - 2⁶ = 67761367 is a prime.

It is a super-2 number, since 2×67761431² = 9183223062335522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 67761391 and 67761400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67761131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15860 + ... + 19673.

It is an arithmetic number, because the mean of its divisors is an integer number (16949718).

Almost surely, 2^67761431 is an apocalyptic number.

67761431 is a deficient number, since it is larger than the sum of its proper divisors (37441).

67761431 is a wasteful number, since it uses less digits than its factorization.

67761431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37440.

The product of its digits is 21168, while the sum is 35.

The square root of 67761431 is about 8231.7331710886. The cubic root of 67761431 is about 407.6876193261.

The spelling of 67761431 in words is "sixty-seven million, seven hundred sixty-one thousand, four hundred thirty-one".