148753721 has 2 divisors, whose sum is σ = 148753722. Its totient is φ = 148753720.

The previous prime is 148753697. The next prime is 148753741. The reversal of 148753721 is 127357841.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143736121 + 5017600 = 11989^2 + 2240^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-148753721 is a prime.

It is a super-2 number, since 2×148753721² = 44255339022691682, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (148753741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74376860 + 74376861.

It is an arithmetic number, because the mean of its divisors is an integer number (74376861).

Almost surely, 2^148753721 is an apocalyptic number.

It is an amenable number.

148753721 is a deficient number, since it is larger than the sum of its proper divisors (1).

148753721 is an equidigital number, since it uses as much as digits as its factorization.

148753721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47040, while the sum is 38.

The square root of 148753721 is about 12196.4634628240. The cubic root of 148753721 is about 529.8536691075.

The spelling of 148753721 in words is "one hundred forty-eight million, seven hundred fifty-three thousand, seven hundred twenty-one".