1321900139 has 8 divisors (see below), whose sum is σ = 1511355648. Its totient is φ = 1132597800.

The previous prime is 1321900121. The next prime is 1321900187. The reversal of 1321900139 is 9310091231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1321900139 - 2¹⁶ = 1321834603 is a prime.

It is a super-3 number, since 3×1321900139³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1321903139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19157 + ... + 54870.

It is an arithmetic number, because the mean of its divisors is an integer number (188919456).

Almost surely, 2^1321900139 is an apocalyptic number.

1321900139 is a deficient number, since it is larger than the sum of its proper divisors (189455509).

1321900139 is an equidigital number, since it uses as much as digits as its factorization.

1321900139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76585.

The product of its (nonzero) digits is 1458, while the sum is 29.

The square root of 1321900139 is about 36357.9446476283. The cubic root of 1321900139 is about 1097.4874164493.

The spelling of 1321900139 in words is "one billion, three hundred twenty-one million, nine hundred thousand, one hundred thirty-nine".