39969487 has 2 divisors, whose sum is σ = 39969488. Its totient is φ = 39969486.

The previous prime is 39969481. The next prime is 39969493. The reversal of 39969487 is 78496993.

It is a balanced prime because it is at equal distance from previous prime (39969481) and next prime (39969493).

It is a cyclic number.

It is not a de Polignac number, because 39969487 - 2⁷ = 39969359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39969481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19984743 + 19984744.

It is an arithmetic number, because the mean of its divisors is an integer number (19984744).

Almost surely, 2^39969487 is an apocalyptic number.

39969487 is a deficient number, since it is larger than the sum of its proper divisors (1).

39969487 is an equidigital number, since it uses as much as digits as its factorization.

39969487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2939328, while the sum is 55.

The square root of 39969487 is about 6322.1425956712. The cubic root of 39969487 is about 341.9082063872.

The spelling of 39969487 in words is "thirty-nine million, nine hundred sixty-nine thousand, four hundred eighty-seven".