308989997351 has 4 divisors (see below), whose sum is σ = 353131425552. Its totient is φ = 264848569152.

The previous prime is 308989997299. The next prime is 308989997429. The reversal of 308989997351 is 153799989803.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-308989997351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (308989997551) 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, 22070714090 + ... + 22070714103.

It is an arithmetic number, because the mean of its divisors is an integer number (88282856388).

Almost surely, 2^308989997351 is an apocalyptic number.

308989997351 is a deficient number, since it is larger than the sum of its proper divisors (44141428201).

308989997351 is an equidigital number, since it uses as much as digits as its factorization.

308989997351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44141428200.

The product of its (nonzero) digits is 132269760, while the sum is 71.

The spelling of 308989997351 in words is "three hundred eight billion, nine hundred eighty-nine million, nine hundred ninety-seven thousand, three hundred fifty-one".