149978407 has 2 divisors, whose sum is σ = 149978408. Its totient is φ = 149978406.

The previous prime is 149978399. The next prime is 149978431. The reversal of 149978407 is 704879941.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 149978407 - 2³ = 149978399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149978447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74989203 + 74989204.

It is an arithmetic number, because the mean of its divisors is an integer number (74989204).

Almost surely, 2^149978407 is an apocalyptic number.

149978407 is a deficient number, since it is larger than the sum of its proper divisors (1).

149978407 is an equidigital number, since it uses as much as digits as its factorization.

149978407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 508032, while the sum is 49.

The square root of 149978407 is about 12246.5671516552. The cubic root of 149978407 is about 531.3037878273.

The spelling of 149978407 in words is "one hundred forty-nine million, nine hundred seventy-eight thousand, four hundred seven".