42072950987 has 2 divisors, whose sum is σ = 42072950988. Its totient is φ = 42072950986.

The previous prime is 42072950879. The next prime is 42072950993. The reversal of 42072950987 is 78905927024.

Together with previous prime (42072950879) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42072950987 - 2²² = 42068756683 is a prime.

It is not a weakly prime, because it can be changed into another prime (42072950287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21036475493 + 21036475494.

It is an arithmetic number, because the mean of its divisors is an integer number (21036475494).

Almost surely, 2^42072950987 is an apocalyptic number.

42072950987 is a deficient number, since it is larger than the sum of its proper divisors (1).

42072950987 is an equidigital number, since it uses as much as digits as its factorization.

42072950987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2540160, while the sum is 53.

The spelling of 42072950987 in words is "forty-two billion, seventy-two million, nine hundred fifty thousand, nine hundred eighty-seven".