67961887 has 16 divisors (see below), whose sum is σ = 81430272. Its totient is φ = 55500480.

The previous prime is 67961863. The next prime is 67961893. The reversal of 67961887 is 78816976.

It is a de Polignac number, because none of the positive numbers 2^k-67961887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67961807) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9588 + ... + 15094.

It is an arithmetic number, because the mean of its divisors is an integer number (5089392).

Almost surely, 2^67961887 is an apocalyptic number.

67961887 is a deficient number, since it is larger than the sum of its proper divisors (13468385).

67961887 is a wasteful number, since it uses less digits than its factorization.

67961887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5598.

The product of its digits is 1016064, while the sum is 52.

The square root of 67961887 is about 8243.8999872633. The cubic root of 67961887 is about 408.0892390183.

The spelling of 67961887 in words is "sixty-seven million, nine hundred sixty-one thousand, eight hundred eighty-seven".