149920451 has 2 divisors, whose sum is σ = 149920452. Its totient is φ = 149920450.

The previous prime is 149920439. The next prime is 149920457. The reversal of 149920451 is 154029941.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-149920451 is a prime.

It is a super-2 number, since 2×149920451² = 44952283256086802, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (149920457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74960225 + 74960226.

It is an arithmetic number, because the mean of its divisors is an integer number (74960226).

Almost surely, 2^149920451 is an apocalyptic number.

149920451 is a deficient number, since it is larger than the sum of its proper divisors (1).

149920451 is an equidigital number, since it uses as much as digits as its factorization.

149920451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 149920451 is about 12244.2007089071. The cubic root of 149920451 is about 531.2353419531.

The spelling of 149920451 in words is "one hundred forty-nine million, nine hundred twenty thousand, four hundred fifty-one".