147373991 has 2 divisors, whose sum is σ = 147373992. Its totient is φ = 147373990.

The previous prime is 147373979. The next prime is 147374009. The reversal of 147373991 is 199373741.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-147373991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (147373921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73686995 + 73686996.

It is an arithmetic number, because the mean of its divisors is an integer number (73686996).

Almost surely, 2^147373991 is an apocalyptic number.

147373991 is a deficient number, since it is larger than the sum of its proper divisors (1).

147373991 is an equidigital number, since it uses as much as digits as its factorization.

147373991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 142884, while the sum is 44.

The square root of 147373991 is about 12139.7689846224. The cubic root of 147373991 is about 528.2104004888.

The spelling of 147373991 in words is "one hundred forty-seven million, three hundred seventy-three thousand, nine hundred ninety-one".