42989371 has 2 divisors, whose sum is σ = 42989372. Its totient is φ = 42989370.

The previous prime is 42989363. The next prime is 42989377. The reversal of 42989371 is 17398924.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42989371 - 2³ = 42989363 is a prime.

It is not a weakly prime, because it can be changed into another prime (42989377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21494685 + 21494686.

It is an arithmetic number, because the mean of its divisors is an integer number (21494686).

Almost surely, 2^42989371 is an apocalyptic number.

42989371 is a deficient number, since it is larger than the sum of its proper divisors (1).

42989371 is an equidigital number, since it uses as much as digits as its factorization.

42989371 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 43.

The square root of 42989371 is about 6556.6280205606. The cubic root of 42989371 is about 350.3109372894.

The spelling of 42989371 in words is "forty-two million, nine hundred eighty-nine thousand, three hundred seventy-one".