42999977 has 2 divisors, whose sum is σ = 42999978. Its totient is φ = 42999976.

The previous prime is 42999973. The next prime is 43000019. The reversal of 42999977 is 77999924.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42784681 + 215296 = 6541^2 + 464^2 .

It is a cyclic number.

It is not a de Polignac number, because 42999977 - 2² = 42999973 is a prime.

It is not a weakly prime, because it can be changed into another prime (42999973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21499988 + 21499989.

It is an arithmetic number, because the mean of its divisors is an integer number (21499989).

Almost surely, 2^42999977 is an apocalyptic number.

It is an amenable number.

42999977 is a deficient number, since it is larger than the sum of its proper divisors (1).

42999977 is an equidigital number, since it uses as much as digits as its factorization.

42999977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2571912, while the sum is 56.

The square root of 42999977 is about 6557.4367705682. The cubic root of 42999977 is about 350.3397435750.

The spelling of 42999977 in words is "forty-two million, nine hundred ninety-nine thousand, nine hundred seventy-seven".