67901987 has 2 divisors, whose sum is σ = 67901988. Its totient is φ = 67901986.

The previous prime is 67901983. The next prime is 67902007. The reversal of 67901987 is 78910976.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 67901987 - 2² = 67901983 is a prime.

It is a super-2 number, since 2×67901987² = 9221359677096338, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (67901983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33950993 + 33950994.

It is an arithmetic number, because the mean of its divisors is an integer number (33950994).

Almost surely, 2^67901987 is an apocalyptic number.

67901987 is a deficient number, since it is larger than the sum of its proper divisors (1).

67901987 is an equidigital number, since it uses as much as digits as its factorization.

67901987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 190512, while the sum is 47.

The square root of 67901987 is about 8240.2661971565. The cubic root of 67901987 is about 407.9693103758.

The spelling of 67901987 in words is "sixty-seven million, nine hundred one thousand, nine hundred eighty-seven".