68490030437 has 4 divisors (see below), whose sum is σ = 68491154316. Its totient is φ = 68488906560.

The previous prime is 68490030431. The next prime is 68490030439. The reversal of 68490030437 is 73403009486.

It is a happy number.

It is a Cunningham number, because it is equal to 261706²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 931104196 + 67558926241 = 30514^2 + 259921^2 .

It is a cyclic number.

It is not a de Polignac number, because 68490030437 - 2¹⁶ = 68489964901 is a prime.

It is a super-2 number, since 2×68490030437² (a number of 22 digits) 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 (68490030431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 464948 + ... + 594269.

It is an arithmetic number, because the mean of its divisors is an integer number (17122788579).

Almost surely, 2^68490030437 is an apocalyptic number.

It is an amenable number.

68490030437 is a deficient number, since it is larger than the sum of its proper divisors (1123879).

68490030437 is a wasteful number, since it uses less digits than its factorization.

68490030437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1123878.

The product of its (nonzero) digits is 435456, while the sum is 44.

The spelling of 68490030437 in words is "sixty-eight billion, four hundred ninety million, thirty thousand, four hundred thirty-seven".