29690391491 has 2 divisors, whose sum is σ = 29690391492. Its totient is φ = 29690391490.

The previous prime is 29690391473. The next prime is 29690391527. The reversal of 29690391491 is 19419309692.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 29690391491 - 2⁶ = 29690391427 is a prime.

It is not a weakly prime, because it can be changed into another prime (29690391461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14845195745 + 14845195746.

It is an arithmetic number, because the mean of its divisors is an integer number (14845195746).

Almost surely, 2^29690391491 is an apocalyptic number.

29690391491 is a deficient number, since it is larger than the sum of its proper divisors (1).

29690391491 is an equidigital number, since it uses as much as digits as its factorization.

29690391491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 944784, while the sum is 53.

The spelling of 29690391491 in words is "twenty-nine billion, six hundred ninety million, three hundred ninety-one thousand, four hundred ninety-one".