42691077 has 32 divisors (see below), whose sum is σ = 74309760. Its totient is φ = 23880960.

The previous prime is 42691069. The next prime is 42691079. The reversal of 42691077 is 77019624.

It is a happy number.

It is not a de Polignac number, because 42691077 - 2³ = 42691069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42691079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1668 + ... + 9389.

It is an arithmetic number, because the mean of its divisors is an integer number (2322180).

Almost surely, 2^42691077 is an apocalyptic number.

It is an amenable number.

42691077 is a deficient number, since it is larger than the sum of its proper divisors (31618683).

42691077 is a wasteful number, since it uses less digits than its factorization.

42691077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11090 (or 11084 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 42691077 is about 6533.8409071541. The cubic root of 42691077 is about 349.4988119100.

The spelling of 42691077 in words is "forty-two million, six hundred ninety-one thousand, seventy-seven".