34778961 has 12 divisors (see below), whose sum is σ = 57412992. Its totient is φ = 19873656.

The previous prime is 34778941. The next prime is 34778981. The reversal of 34778961 is 16987743.

It is an interprime number because it is at equal distance from previous prime (34778941) and next prime (34778981).

It is not a de Polignac number, because 34778961 - 2⁷ = 34778833 is a prime.

It is a super-2 number, since 2×34778961² = 2419152256479042, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (34778941) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 275961 + ... + 276086.

It is an arithmetic number, because the mean of its divisors is an integer number (4784416).

Almost surely, 2^34778961 is an apocalyptic number.

It is an amenable number.

34778961 is a deficient number, since it is larger than the sum of its proper divisors (22634031).

34778961 is a wasteful number, since it uses less digits than its factorization.

34778961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552060 (or 552057 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 34778961 is about 5897.3689896428. The cubic root of 34778961 is about 326.4165732375.

The spelling of 34778961 in words is "thirty-four million, seven hundred seventy-eight thousand, nine hundred sixty-one".