68903989 has 16 divisors (see below), whose sum is σ = 86140800. Its totient is φ = 53544960.

The previous prime is 68903987. The next prime is 68904019. The reversal of 68903989 is 98930986.

It is not a de Polignac number, because 68903989 - 2¹ = 68903987 is a prime.

It is a super-2 number, since 2×68903989² = 9495519400224242, 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 (68903983) 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, 33577 + ... + 35569.

It is an arithmetic number, because the mean of its divisors is an integer number (5383800).

Almost surely, 2^68903989 is an apocalyptic number.

It is an amenable number.

68903989 is a deficient number, since it is larger than the sum of its proper divisors (17236811).

68903989 is a wasteful number, since it uses less digits than its factorization.

68903989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2460.

The product of its (nonzero) digits is 839808, while the sum is 52.

The square root of 68903989 is about 8300.8426680669. The cubic root of 68903989 is about 409.9662653188.

The spelling of 68903989 in words is "sixty-eight million, nine hundred three thousand, nine hundred eighty-nine".