81419007 has 8 divisors (see below), whose sum is σ = 108601984. Its totient is φ = 54257688.

The previous prime is 81418991. The next prime is 81419021. The reversal of 81419007 is 70091418.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 81419007 - 2⁴ = 81418991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81419027) 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, 8388 + ... + 15270.

It is an arithmetic number, because the mean of its divisors is an integer number (13575248).

Almost surely, 2^81419007 is an apocalyptic number.

81419007 is a deficient number, since it is larger than the sum of its proper divisors (27182977).

81419007 is a wasteful number, since it uses less digits than its factorization.

81419007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10829.

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 81419007 is about 9023.2481402209. The cubic root of 81419007 is about 433.4196533496.

The spelling of 81419007 in words is "eighty-one million, four hundred nineteen thousand, seven".