29972866477 has 2 divisors, whose sum is σ = 29972866478. Its totient is φ = 29972866476.

The previous prime is 29972866457. The next prime is 29972866493. The reversal of 29972866477 is 77466827992.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24391880041 + 5580986436 = 156179^2 + 74706^2 .

It is a cyclic number.

It is not a de Polignac number, because 29972866477 - 2⁷ = 29972866349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29972866457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14986433238 + 14986433239.

It is an arithmetic number, because the mean of its divisors is an integer number (14986433239).

Almost surely, 2^29972866477 is an apocalyptic number.

It is an amenable number.

29972866477 is a deficient number, since it is larger than the sum of its proper divisors (1).

29972866477 is an equidigital number, since it uses as much as digits as its factorization.

29972866477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 128024064, while the sum is 67.

The spelling of 29972866477 in words is "twenty-nine billion, nine hundred seventy-two million, eight hundred sixty-six thousand, four hundred seventy-seven".