40069897 has 24 divisors (see below), whose sum is σ = 48328704. Its totient is φ = 33106752.

The previous prime is 40069889. The next prime is 40069921. The reversal of 40069897 is 79896004.

40069897 = T₃₉₈ + T₃₉₉ + ... + T₆₇₁.

It is not a de Polignac number, because 40069897 - 2³ = 40069889 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40069807) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 292413 + ... + 292549.

It is an arithmetic number, because the mean of its divisors is an integer number (2013696).

Almost surely, 2^40069897 is an apocalyptic number.

40069897 is a gapful number since it is divisible by the number (47) formed by its first and last digit.

It is an amenable number.

40069897 is a deficient number, since it is larger than the sum of its proper divisors (8258807).

40069897 is a wasteful number, since it uses less digits than its factorization.

40069897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325 (or 318 counting only the distinct ones).

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

The square root of 40069897 is about 6330.0787514849. The cubic root of 40069897 is about 342.1942770646.

The spelling of 40069897 in words is "forty million, sixty-nine thousand, eight hundred ninety-seven".