29772420947 has 2 divisors, whose sum is σ = 29772420948. Its totient is φ = 29772420946.

The previous prime is 29772420929. The next prime is 29772420971. The reversal of 29772420947 is 74902427792.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 29772420947 - 2²² = 29768226643 is a prime.

It is not a weakly prime, because it can be changed into another prime (29772420047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14886210473 + 14886210474.

It is an arithmetic number, because the mean of its divisors is an integer number (14886210474).

Almost surely, 2^29772420947 is an apocalyptic number.

29772420947 is a deficient number, since it is larger than the sum of its proper divisors (1).

29772420947 is an equidigital number, since it uses as much as digits as its factorization.

29772420947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3556224, while the sum is 53.

The spelling of 29772420947 in words is "twenty-nine billion, seven hundred seventy-two million, four hundred twenty thousand, nine hundred forty-seven".