134990842921 has 27 divisors (see below), whose sum is σ = 150126713373. Its totient is φ = 121289719320.

The previous prime is 134990842901. The next prime is 134990842949. The reversal of 134990842921 is 129248099431.

The square root of 134990842921 is 367411.

It is a perfect power (a square), and thus also a powerful number.

It is a de Polignac number, because none of the positive numbers 2^k-134990842921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (134990842901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 513273036 + ... + 513273298.

Almost surely, 2^134990842921 is an apocalyptic number.

134990842921 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

134990842921 is the 367411-st square number.

134990842921 is the 183706-th centered octagonal number.

It is an amenable number.

134990842921 is a deficient number, since it is larger than the sum of its proper divisors (15135870452).

134990842921 is an frugal number, since it uses more digits than its factorization.

134990842921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802 (or 401 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 52.

The spelling of 134990842921 in words is "one hundred thirty-four billion, nine hundred ninety million, eight hundred forty-two thousand, nine hundred twenty-one".