191421494 has 16 divisors (see below), whose sum is σ = 313493760. Its totient is φ = 86937960.

The previous prime is 191421493. The next prime is 191421499. The reversal of 191421494 is 494124191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191421493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31127 + ... + 36765.

It is an arithmetic number, because the mean of its divisors is an integer number (19593360).

Almost surely, 2^191421494 is an apocalyptic number.

191421494 is a deficient number, since it is larger than the sum of its proper divisors (122072266).

191421494 is a wasteful number, since it uses less digits than its factorization.

191421494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7195.

The product of its digits is 10368, while the sum is 35.

The square root of 191421494 is about 13835.5156752468. The cubic root of 191421494 is about 576.3198354733.

The spelling of 191421494 in words is "one hundred ninety-one million, four hundred twenty-one thousand, four hundred ninety-four".