29874862921 has 2 divisors, whose sum is σ = 29874862922. Its totient is φ = 29874862920.

The previous prime is 29874862903. The next prime is 29874862949. The reversal of 29874862921 is 12926847892.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27643717696 + 2231145225 = 166264^2 + 47235^2 .

It is a cyclic number.

It is not a de Polignac number, because 29874862921 - 2⁵ = 29874862889 is a prime.

It is a super-3 number, since 3×29874862921³ (a number of 32 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (29874862951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14937431460 + 14937431461.

It is an arithmetic number, because the mean of its divisors is an integer number (14937431461).

Almost surely, 2^29874862921 is an apocalyptic number.

It is an amenable number.

29874862921 is a deficient number, since it is larger than the sum of its proper divisors (1).

29874862921 is an equidigital number, since it uses as much as digits as its factorization.

29874862921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6967296, while the sum is 58.

The spelling of 29874862921 in words is "twenty-nine billion, eight hundred seventy-four million, eight hundred sixty-two thousand, nine hundred twenty-one".