146087731 has 4 divisors (see below), whose sum is σ = 146137000. Its totient is φ = 146038464.

The previous prime is 146087677. The next prime is 146087771. The reversal of 146087731 is 137780641.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 137780641 = 47 ⋅2931503.

It is a cyclic number.

It is not a de Polignac number, because 146087731 - 2⁷ = 146087603 is a prime.

It is a super-2 number, since 2×146087731² = 42683250297456722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (146087771) 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, 19881 + ... + 26218.

It is an arithmetic number, because the mean of its divisors is an integer number (36534250).

Almost surely, 2^146087731 is an apocalyptic number.

146087731 is a deficient number, since it is larger than the sum of its proper divisors (49269).

146087731 is an equidigital number, since it uses as much as digits as its factorization.

146087731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49268.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 146087731 is about 12086.6757630045. The cubic root of 146087731 is about 526.6691919354.

The spelling of 146087731 in words is "one hundred forty-six million, eighty-seven thousand, seven hundred thirty-one".