137945978 has 16 divisors (see below), whose sum is σ = 212853696. Its totient is φ = 67011840.

The previous prime is 137945923. The next prime is 137945981. The reversal of 137945978 is 879549731.

137945978 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12443 + ... + 20753.

It is an arithmetic number, because the mean of its divisors is an integer number (13303356).

Almost surely, 2^137945978 is an apocalyptic number.

137945978 is a deficient number, since it is larger than the sum of its proper divisors (74907718).

137945978 is a wasteful number, since it uses less digits than its factorization.

137945978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8549.

The product of its digits is 1905120, while the sum is 53.

The square root of 137945978 is about 11745.0405703854. The cubic root of 137945978 is about 516.6974848538.

The spelling of 137945978 in words is "one hundred thirty-seven million, nine hundred forty-five thousand, nine hundred seventy-eight".