29901143639 has 2 divisors, whose sum is σ = 29901143640. Its totient is φ = 29901143638.

The previous prime is 29901143621. The next prime is 29901143641. The reversal of 29901143639 is 93634110992.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-29901143639 is a prime.

It is a super-2 number, since 2×29901143639² (a number of 22 digits) contains 22 as substring.

Together with 29901143641, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 29901143593 and 29901143602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29901143689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14950571819 + 14950571820.

It is an arithmetic number, because the mean of its divisors is an integer number (14950571820).

Almost surely, 2^29901143639 is an apocalyptic number.

29901143639 is a deficient number, since it is larger than the sum of its proper divisors (1).

29901143639 is an equidigital number, since it uses as much as digits as its factorization.

29901143639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 314928, while the sum is 47.

The spelling of 29901143639 in words is "twenty-nine billion, nine hundred one million, one hundred forty-three thousand, six hundred thirty-nine".