34987981 has 8 divisors (see below), whose sum is σ = 40188800. Its totient is φ = 29837808.

The previous prime is 34987973. The next prime is 34987993. The reversal of 34987981 is 18978943.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 34987981 - 2³ = 34987973 is a prime.

It is a super-2 number, since 2×34987981² = 2448317628912722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34987961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11166 + ... + 13951.

It is an arithmetic number, because the mean of its divisors is an integer number (5023600).

Almost surely, 2^34987981 is an apocalyptic number.

It is an amenable number.

34987981 is a deficient number, since it is larger than the sum of its proper divisors (5200819).

34987981 is a wasteful number, since it uses less digits than its factorization.

34987981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25323.

The product of its digits is 435456, while the sum is 49.

The square root of 34987981 is about 5915.0639049802. The cubic root of 34987981 is about 327.0691839264.

The spelling of 34987981 in words is "thirty-four million, nine hundred eighty-seven thousand, nine hundred eighty-one".