42209977 has 2 divisors, whose sum is σ = 42209978. Its totient is φ = 42209976.

The previous prime is 42209971. The next prime is 42209983. The reversal of 42209977 is 77990224.

It is a balanced prime because it is at equal distance from previous prime (42209971) and next prime (42209983).

It can be written as a sum of positive squares in only one way, i.e., 35712576 + 6497401 = 5976^2 + 2549^2 .

It is a cyclic number.

It is not a de Polignac number, because 42209977 - 2¹¹ = 42207929 is a prime.

It is not a weakly prime, because it can be changed into another prime (42209971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21104988 + 21104989.

It is an arithmetic number, because the mean of its divisors is an integer number (21104989).

Almost surely, 2^42209977 is an apocalyptic number.

It is an amenable number.

42209977 is a deficient number, since it is larger than the sum of its proper divisors (1).

42209977 is an equidigital number, since it uses as much as digits as its factorization.

42209977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 42209977 is about 6496.9205782432. The cubic root of 42209977 is about 348.1809761324.

The spelling of 42209977 in words is "forty-two million, two hundred nine thousand, nine hundred seventy-seven".