137061643 has 4 divisors (see below), whose sum is σ = 137969488. Its totient is φ = 136153800.

The previous prime is 137061641. The next prime is 137061671. The reversal of 137061643 is 346160731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 346160731 = 7 ⋅49451533.

It is a cyclic number.

It is not a de Polignac number, because 137061643 - 2¹ = 137061641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137061641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 453696 + ... + 453997.

It is an arithmetic number, because the mean of its divisors is an integer number (34492372).

Almost surely, 2^137061643 is an apocalyptic number.

137061643 is a deficient number, since it is larger than the sum of its proper divisors (907845).

137061643 is an equidigital number, since it uses as much as digits as its factorization.

137061643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 907844.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 137061643 is about 11707.3328730330. The cubic root of 137061643 is about 515.5909802250.

The spelling of 137061643 in words is "one hundred thirty-seven million, sixty-one thousand, six hundred forty-three".